- Clarus Wealth Ltd
- Class 45/1 Preservation Society
- Class 50 locomotive association
- Class 504 Preservation Society
- Class Act Theatre Company
- Class Act Theatre School
- Classical Cleveland
- Classical Conversations Homeschool Community
- Classical LaDanza
- Classical Opera
- Classics For All London
- Classique Boutiques
- Classique School of Dance
- Classroom Learning On Wheels, Doing Education Right (CLOWDER)
- Classrooms For Malawi 2019 - Chloe Smith
- Classrooms For Malawi 2021 - Heather lawson
- Classrooms In The Clouds - Elivia Thomson
- Classrooms for Kenya
- Classrooms for Kenya 2022 - Bethan Evans
- Classrooms for Kenya 2023 - Fiona Christer
- Classrooms for Malawi 2016 - Donna Millar
- Classrooms for Malawi 2017 - Georgia Porter
- Classrooms for Malawi 2018 Beth Hannay
- Classrooms for Malawi 2019 - Enya Basquill
- Classrooms for Tinga Tinga
- Classrooms in the Clouds Nepal 2015 - Elaine Gnyp
- Clatford School PTA - Andover
- Clatt Community Business
- Clatterbridge Cancer Centre Fundraiser 2015 - Vikki Hegerty
- Clatto Clan Flyball Club
- Claudia Cheung 2021
- Claudia Climing Three Peaks for Marie Curie
- Claudia James, World Challenge, Bali 2026
- Claudia Johnson Kenya
- Claudia Kennedy - India 2025 - Global Action
- Claudia Laird
- Claudia O’Neill Philippines Conservation Project Trust
- Claudia Potter - 2021
- Claudia Sava fundraising for my sister's cancer treatment
- Claudia Stiles - Three Peaks
- Claudia Uni
- Claudiana Sanwo-Olu 2021
- Claudia’s Uni Fund
- Claudio Taglieri fundraising for arm surgery
- Claudy Futsal
- Claudy Rainbows and Brownies
- Claughton St Marys
- Claus For A Cause
- Clause for a Cause
- Claverdon Minis/Juniors Rugby Club
- Claverdon RFC
- Claverham Cricket Club
- Claverham and Winford Riding for the Disabled
- Claverhouse Rotary Trust
- Clavering Jubilee Field
- Clavering Village Hall
- Clavering and Arkesden Preschool - Clavering
- Claverley School PTA Shropshire
- Claverley Youth Club
- Claverton Pumping Station
- Claws 'n' Paws - Hartlepool
- Claws Cat Rescue
- Clawton Parent and Toddler Group
- Clawton Preschool and Toddlers
- Clawton Primary School, Holsworthy
- Clay Country Rockin' Club
- Clay County Cat Care
- Clay County Cat Care - Dorset Adoption Centre - Claire Adams
- Clay Cross Bulldogs
- Clay Cross Foodbank
- Clay Cross Senior Section Guides
- Clay Cross United FC
- Claydon Football Club U8s
- Claydon High School PTA, Ipswich
- Claydon Pre School
- Claydon Primary HSA
- Claydon Under 14s girls
- Clayesmore School - Dorset
- Clayesmore South Africa Rugby Tour 2017
- Claygate Choral Society
- Claygate Primary School Parents Association
- Claygate Recreation Ground Trust
- Claygate Village Youth Club Association
- Claygate Youth and Community Hub
- Claymores Amateur Boxing Club
- Claypole Primary C of E School
- Claypole Village Hall
- Claypool Primary School, Bolton
- Claypotts Castle Primary School, Dundee
- Claytime Stockport
- Clayton Baptist Church - Bradford
- Clayton Brook Community House
- Clayton CC
- Clayton Green Scout Group
- Clayton Methodist Church
- Clayton Rugby Club
- Clayton St John PTFA
- Clayton Victoria Bowls
- Clayton Villa Fc
- Clayton West Cricket Club
- Clayton le Moors All Saints` CEP School
- Clayton le Woods CE Primary School PTFA
- Clayton le moor Pre school
- Clayton with Keymer
- Claytons PTA - Bourne End
- Cleadon Academy PTFA
- Cleadon Archers
- Clean Break
- Clean Coast Outer Hebrides
- Clean Herts Community CIC
- Clean Jurassic Coast
- Clean Seas Please
- Clean Sheet
- Clean Slate
- Clean Slate Financial Wellbeing Services CIC
- Clean Slate Solutions
- Clean Water - Kithoka
- Clean Water For Moldova - Sinai 30
- Clean Water Project
- Clean Water to Ghana Chris Jones
- Clean up Tarbolton Woods
- CleanIt UK
- Cleaner And Dryer
- Cleanslate FC
- Clear Mind Derby Community Interest Company
- Clear The Head Mental Health Support Group
- Clear Vision Trust
- Clear Waters The Gambia
- ClearCommunityWeb
- ClearVision Project
- ClearYourHeadFC
- Clearly Speaking
- Clearwell C of E Primary School
- Cleary's Community Boxing Gym
- Cleaswell Hill Foundation
- Cleator Cricket Club
- Cleator Moor Celtic FC
- Cleck Sporting Juniors.
- Cleckheaton Bowling Club
- Cleckheaton Cricket Club
- Cleckheaton Foodbank
- Cleckheaton Junior Rugby U15S Tour
- Cleckheaton Juniors FC
- Cleckheaton Rugby Club
- Cleckheaton Sports Club Legacy Project
- Cleddau Chamber Orcehstra
- Cleddau Reach Archers
- Cleddens Learning And Child Care Centre - Glasgow
- Clee Community Colts JFC
- Clee Hill Community Academy PTA
- Clee Town Ladies U9 24/25
- Clee Town Pattersons
- Clee Town U14
- Cleethorpes & District Swimming Club
- Cleethorpes And Grimsby Riding for the Disabled
- Cleethorpes Athletics Club
- Cleethorpes Childcare
- Cleethorpes Community Sports
- Cleethorpes Cricket Club
- Cleethorpes Girls U12
- Cleethorpes RUFC
- Cleethorpes RUFC Juniors
- Cleethorpes Town JFC U14 OWLS
- Cleethorpes Town Ladies
- Cleethorpes Town Owls u15s
- Cleethorpes Town Tilletts U14’s
- Cleethorpes Trinity Football Club
- Cleethorpes town Pattesons
- Cleeton St Mary Church
- Cleeve Chorale
- Cleeve Harmony
- Cleeve Hill Lawn Tennis Club - Mission4Courts
- Cleeve Meadow School
- Cleeve School Cheltenham
- Cleeve Tennis Club
- Cleeve West Town FC
- Cleft Lip and Palate Association CLAPA
- Clegwell Archers - Hebburn
- Clegwell FC
- Clehonger Action Network
- Clehonger Primary School
- Clemence Uni Fund
- ClementJames Centre
- Clementina Center for Children with Special Needs
- Clemmie Cooper’s Sporting Journey
- Clenchwarton Community Foundation Trust
- Clenchwarton FC
- Clenchwarton Pre-School - King's Lynn
- Clent Parochial Primary School - Stourbridge, Holy Cross
- Clent View Cat & Kitten Rescue
- Clentry Nursery School
- Cleo Elliott-Cooter African School Fundraiser
- Cleobury Methodist Church
- Cleobury Mortimer Bowls Club
- Cleobury Mortimer Mens Shed
- Cleobury Mortimer YFC Young Farmers Club
- Cleobury North with Burwarton PCC
- Cleopatra's Legacy CIC
- Cleo’s Mutley Crew Dog Rescue
- Clepie Kids Club - Dundee
- Clermiston Parent Council - Edinburgh
- Clermiston Primary Parent Council
- Cleve Archers
- Cleve RFC Under 9’s
- Cleve Rugby - Kids born 1999-2000
- Cleve Rugby Minis - Kids Born 2001/02
- Cleve u13 2015-16
- Cleveden Secondary Parent Council
- Clevedon And District Foodbank Cio
- Clevedon Brass
- Clevedon Coastal Rowing
- Clevedon Community Bookshop Co-operative
- Clevedon Community First Responders
- Clevedon East District Guide Centre
- Clevedon Ladies Hockey Club
- Clevedon Lawn Tennis Club
- Clevedon Lions Club
- Clevedon Men’s Shed
- Clevedon Pier and Heritage Trust Ltd
- Clevedon Platoon - Somerset ACF
- Clevedon Promenade Bowling Club
- Clevedon Rugby Football Club
- Clevedon School
- Clevedon Swimming Club
- Clevedon Town Football Club
- Clevedon Town Walking Football Club
- Clevedon United Amatuers
- Clevedon United Junior Football Club
- Clevedon YMCA
- Cleveland AFC
- Cleveland Bay Horse Society
- Cleveland Beekeepers Association
- Cleveland Classics Netball Club
- Cleveland Cobras
- Cleveland Concert Band
- Cleveland Darts Organisation
- Cleveland Hedgehog Preservation Society
- Cleveland Hunt Branch of the Pony Club
- Cleveland Ironstone Mining Museum
- Cleveland Juniors Cats
- Cleveland Juniors FC
- Cleveland Lions FC
- Cleveland Philharmonic Choir
- Cleveland Scouts Norway 2014
- Cleveland Scouts Zambia 2021
- Cleveland Volunteer Police Cadets
- Cleveland Walk 2014 - Joss Tullius
- Cleveland Wheelers Cycling Club
- Cleveland jrs EAGLES u8s FC
- Cleveland juniors
- Clevelands Prep School Bolton
- Clevelands Preparatory School - Friends Of Clevelands PTA
- Cleveleys Town Centre Group
- Cleveleys United Reformed Church
- Clever Clogs Family Partnership Group
- Clever Dogs Rescue
- Clever Never Goes
- CleverGreen Sustainable Festival
- Cleverclogs Norwich
- Cleves School - Weybridge
- Clewer & Dedworth Together CIC
- Clews Claws Rescue
- Cley village hall
- Clic English
- Clic Sargent: Farmageddon 2014 - Matt, Chris, Paul, James and Ryan
- Clic Sargent: London Marathon - Matt Joyner
- Clic Sargent: London Marathon 2014 - Janet Glover
- ClicSargent - Paula Knight
- Click 4 Action eRotary
- Cliddesden Primary School - Friends, Basingstoke
- Cliff College
- Cliff House Community Support Services
- Cliff Lane Friends - Ipswich
- Cliff Park Community Church
- Cliff Top Kennels Rehoming Centre
- Cliffe Bonfire Society
- Cliffe House Nursery
- Cliffe Park Bowling Club
- Cliffe Pre-School - Rochester
- Cliffe Tennis Club
- Cliffe VC Primary School
- Cliffe Woods Primary School - Rochester
- Cliffhollins RDA group
- Clifford AFC
- Clifford All Saints C of E Primary School
- Clifford Bridge Academy PTFA
- Clifford Chambers Village Hall
- Clifford Pre School
- Clifford Primary PTFA - Herefordshire
- Clifford Primary School - Hardwicke
- Clifton & Lightcliffe Brass Band
- Clifton Aces 10s Football Team
- Clifton Aces Blues Under 13s
- Clifton All Saints Academy PTA
- Clifton Campville Village Hall
- Clifton CofE Primary School, Clifton Village
- Clifton College South American Rugby Tour In Support Of United Through Sport
- Clifton Community & Family Support Group
- Clifton County Primary School PTA - Penrith
- Clifton Cricket Club
- Clifton FC
- Clifton Festival of Music
- Clifton Green Primary School Fund
- Clifton Hall School, Newbridge, Edinburgh
- Clifton Hampden Primary School
- Clifton Handbell Ringers
- Clifton High School Foundation
- Clifton Junior Cycling Club
- Clifton Methodist Church - York
- Clifton Moor Church
- Clifton Moor Out of School Club
- Clifton PCC - York
- Clifton Parish, Nottingham
- Clifton Playgroup - Rugby
- Clifton Playgroup and Toddlers
- Clifton RFC - U14s - 2015 Rugby Tour (Argentina)
- Clifton Rangers
- Clifton Rangers JFC u8's
- Clifton Rangers Junior Football Club
- Clifton Rangers U15’s
- Clifton Rangers YFC
- Clifton Rangers YFC Upcoming U7s Team
- Clifton St Vincents AFC
- Clifton Street Preschool
- Clifton Suspension Bridge Trust
- Clifton Upon Dunsmore CofE Primary School PTA
- Clifton Upon Teme Nursery and Pre-School - Worcestershire
- Clifton Upon Teme Primary School Worcester PTA
- Clifton Village Nursery
- Clifton-On-Teme Village Hall
- Clifton-upon-Teme Early Years Centre
- Clifton-upon-Teme Primary School - Worcs
- Cliftonettes Netball Club
- Cliftonpark Avenue Baptist Church
- Cliftonville Community Centre
- Cliftonville Hockey Club
- Cliftonville Integrated Primary School PTFA
- Cliftonville YBC (Youth Bowling Club)
- Cliftonville and Coatdyke Community Group
- Cliik Community Limited
- ClimArts
- Climate 2025
- Climate Action Hub Exeter
- Climate Action Lewisham
- Climate Bonds Initiative
- Climate Cafe
- Climate Change All Change
- Climate Ed
- Climate Friends
- Climate Stewards - Frome
- Climate and Community
- Climb 2 Confidence
- Climb 4 Limited
- Climb Kili for Cornerstone 2014 - Claire Agnew
- Climb Kili for Cornerstone 2014 - Frances Thomson
- Climb Kili for Hope for Children 2014 - Hannah Nottage
- Climb Kilimanjaro - Clarrie Smith
- Climb Kilimanjaro for Kids 2011 - Daniel McFarlane
- Climb Kilimanjaro for MRF - Alicia Wallace - 2022
- Climb Kilimanjaro for MRF - Jessica Cross - 2021
- Climb Kilimanjaro for Practical Action and Meningitis Research - Molly Gray
- Climb Killi for Childs Reach International Isabella Burton - 2014
- Climb Mount Kilimanjaro 2015 - Kasim Hassan
- Climb Mount Kilimanjaro for MRF - 2021 - Emily Burkitt
- Climb Mount Snowdon for AutismTogether/Gallagher House - Brenda Palmer
- Climb South West Trail Team
- Climb Your Mountain
- Climb for Kilimanjaro Orphanage Centre 2015 - Alexander Statham
- Climb with us Amani Children's Home
- Climb2Recovery
- Climb4Kidz
- ClimbKili4Kids - Amy Sibson
- ClimbSteps - Paul Pounder
- Climbers Against Cancer
- Climbers Kids Club - Walthamstow
- Climbing - Euan Williams
- Climbing Bears Pre-School - Wisborough Green
- Climbing Ben Lomond for Alzheimer's Scotland Alzheimer's Society - Susan Grubb
- Climbing Everest 2015 For Marie Curie Cancer Care - Dave and Rach
- Climbing Everest 2020 to raise funds for the Children's Society - Zara Bracegirdle
- Climbing Everest Base Camp for MFR - 2021 - Kirsten de Escofet
- Climbing Everest Base Camp for MRF - 2021 - Iris Bruins
- Climbing For Cancer
- Climbing Kilamanjaro In October 2024 To Raise Money For Mduk Daniel Cooper
- Climbing Kilimajaro for MRF - Laura - Marie Patterson
- Climbing Kilimanjaro for Childreach 2017 - Harry Whitaker
- Climbing Kilimanjaro 2014 for Meningitis Research Foundation - Ryan Morton
- Climbing Kilimanjaro 2014 for The Meningitis Research Foundation - Rosie Byne
- Climbing Kilimanjaro 2015 for Meningitis Research Foundation - Sherisa Gumbs
- Climbing Kilimanjaro 2016 for Childreach - Tierney Carter
- Climbing Kilimanjaro 2016 for Childreach International - Rebecca Lloyd
- Climbing Kilimanjaro 2016 for Childreach International - Sarah Rowan
- Climbing Kilimanjaro 2016 for Dig Deep - Vanya Gurr
- Climbing Kilimanjaro 2016 for Worldwide Cancer Research - Megan Hughes
- Climbing Kilimanjaro 2019 - Rachel Sheasby
- Climbing Kilimanjaro 2025 Charlotte Horler
- Climbing Kilimanjaro For SANE - Mark Pearce
- Climbing Kilimanjaro for Cancer Reaearch UK - Elena Jose
- Climbing Kilimanjaro for Cancer Research - Ellie Ritchie
- Climbing Kilimanjaro for Childreach 2014 - Lois Holman
- Climbing Kilimanjaro for Childreach International - Sam Schoen
- Climbing Kilimanjaro for Giving Africa - Nicola Burke
- Climbing Kilimanjaro for MRF - 2021 - Cameron Gibson
- Climbing Kilimanjaro for MRF - Cathal Dunne 2024
- Climbing Kilimanjaro for MRF - Ellie Waghorn 2021
- Climbing Kilimanjaro for MRF - Guyon Trussell - 2021
- Climbing Kilimanjaro for MRF - Katie Towler
- Climbing Kilimanjaro for MRF - Maddie Chambers - 2021
- Climbing Kilimanjaro for MRF - Matt Pascoe - 2021
- Climbing Kilimanjaro for MRF - Nicola Edwards
- Climbing Kilimanjaro for MRF - Oliver Difford 2021
- Climbing Kilimanjaro for MRF 2021 - Ashish Ghising
- Climbing Kilimanjaro for MRF 2021 - Claudia Taylor
- Climbing Kilimanjaro for MRF 2022 - Nina Higins
- Climbing Kilimanjaro for Marie Curie - Amelia Huggan
- Climbing Kilimanjaro for Meningitis Research - Caitlin Stevenson
- Climbing Kilimanjaro for Meningitis Research Foundation 2014 - Molly Preen
- Climbing Kilimanjaro for Meningitis Research Foundation 2020 - Joshua Spiers
- Climbing Kilimanjaro for Meninjitis Research Foundation 2019 - Florence Slark
- Climbing Kilimanjaro in aid Meningitis Research Foundation 2014 - David Braham
- Climbing Kilimanjaro in aid of Meningitis Research Foundation - Clara Marcelli
- Climbing Killimanjaro 2014 for The Facefax Association - Emma and Sharon
- Climbing Machu Picchu for MRF - 2021 - Holly Greenwood
- Climbing Mount Kilimanjaro 2016 for The Children's Society - Ben Hart
- Climbing Mount Kilimanjaro for Dig Deep 2019 - Jessica Oghenegweke
- Climbing Mount Kilimanjaro for Hope For Children 2019 - Rosie Davies
- Climbing Mount Kilimanjaro for MRF - 2021 - Rosie Webster
- Climbing Mount Kilimanjaro for MRF - Angharad Beach - 2021
- Climbing Mount Kilimanjaro for MRF - Zoe Cranstone - 2021
- Climbing Mount Kilimanjaro for MRF 2021 - Dylan Danga
- Climbing Mount Kilimanjaro for MRF 2021 - Gwennan Drouillet
- Climbing Mount Kilimanjaro for MRF 2021 - Tom Beaumont
- Climbing Mount Toubkal 2016 for Hope for Children - Claudia Robinson
- Climbing Mt Kilimanjaro For Meningitis Research Foundation - Emma Gibbs
- Climbing Mt Snowdon For The Downs Syndrome Association - Helen Medel Gonzalez
- Climbing Mt. Kilimanjaro for MRF - Will Taylor
- Climbing Out
- Climbing Snowden for Christie Foundation
- Climbing Snowdonia 2016 for NSPCC - Trevor Johnson
- Climbing and Mountaineering - WSU
- Climbing to Everest base camp 2021 - Lucy Milner
- Climbs Kilimanjaro for MRF - Ben Metzger - 2021
- Clincarthill Church
- Clinical Pharmacology, St George's University Of London - Ibrahim Yeski
- Clinical and Ancient Psychology Program Placement 2019 - Ferdinand Olivares
- Clinical and Ancient Psychology Programme India 2019 - Kate Purdy
- Clinical and Ancient Psychology Programme India 2020 - Jacob Moorcroft
- Clinks
- Clinton Adejuyigbe
- Clinton Devon Estates
- Clip Clops
- Clipper Race Funding - James Gough
- Clipper Round the Word Yacht Race - 2015 / 2016 - Trudi Bubb
- Clipper Round the World 2019/20 - Steve Wollen
- Clipper Round the World Race - Kate Vaughan-Jones
- Clipper Round the World Yacht Race 2015/16 - Graham Headicar
- Clipper Round the World Yacht Race 2015/16 - Ruth Charles
- Clipston School Association
- Clipstone Bowls Club
- Clipstone Brook Association
- Clipstone Community Regeneration Group CIC
- Clipstone Cricket Club
- Clipstone Girlguiding
- Clipstone Silverbirds
- Clipstone Welfare Colts FC
- Clipstone Welfare JFC
- Clissold Rangers Football Club
- Clissold Table-Tennis Club
- Clitheroe Blackburn Northern Hockey Club
- Clitheroe Cricket Bowling Section
- Clitheroe Cricket Club
- Clitheroe Dolphins
- Clitheroe Football Club
- Clitheroe Rugby Club
- Clitheroe Scouts Jamboree Japan 2015
- CliveGlen Small Dog Rescue
- Cloakham Lawn Sports Centre
- Clober Primary PTA - Milngavie
- Cloc Youth Musical Theatre Company
- Clock Face JFC
- Clock Face Miners ARLFC
- Clockhouse Bowling Club
- Clockhouse Preschool - Beckenham
- Clockhouse and New Charlton Community Centre
- Clocktower Childcare - Snodland
- Clogher Diocese
- Clonduff Mens Shed
- Clonduff Playgroup Hilltown
- Clonoe Boxing Club
- Clonter Farm Music Trust
- Clophill Centre Fund Raising
- Clophill Preschool - Bedford
- Clopton Nursery Trust
- Clore Shalom PTA - Shenley
- Clore Shalom School Shenley
- Clore Tikva Foundation
- Close Ancestry
- Close To Home Childcare Ltd
- Close-Knit CIC
- Closeburn Parish Church of Scotland