| 100 Marathon Club | 26.2 RRC | Abingdon Amblers |
| Alchester | Almost Athletes | Ampthill & Flitwick Flyers |
| Army | Ashford and District Road Runn | ATI-ULTRA |
| BAD Tri | Banbury Harriers | Barnes Runners |
| Basingstoke & Mid Hants AC | Beckenham Running Club | Benfleet RC |
| Blackwater AC | Bracknell forest Runners | British Airways AC |
| British Army | Canterbury Harriers | Cherwell Runners & Joggers |
| Chiltern Harriers | Clapham Chasers | Compton Harriers |
| Crystal Palace Triathlon Club | CWTC | Cyclones |
| Datchet Dashers | Dereham Runners | Donnington Runners |
| Ealing Eagles Running Club | East London Runners | Eastbourne Rovers AC |
| Epsom Oddballs RC | Evo Tri | Fairlands Valley Spartans |
| Fetch Everyone | Gade Valley Harriers | GOODGYM |
| GoodGym Race Team | Hailsham Harriers | Harpenden Arrows |
| Harwich Runners | Headington Road Runners | Helensburgh AAC |
| Hogweed Trotters | Ilkeston Running Club | Lagan Valley AC |
| London RC | Lordshill Road Runners | MMKAC |
| Mornington Chasers | Mornington Crescent | Mudcrew Running |
| NCTR | North Cotswold Tri & Run | Northampton Road Runners |
| One Race Team | Phoenix Tri Guildford | Portsmouth Joggers |
| PSOF | Putney | Quantock Harriers |
| Radley Ac | RAF Tri | Raidlight UK |
| Rasslers | Reading Joggers | Reading Roadrunners |
| Road Runners Club | Run Henley | Run Wallingford |
| Ryde Harriers | Sandhurst joggers | Serpentine |
| Slinn Allstars | Sole Sisters North Bristol | South Devon Athletic |
| South London Harriers | Southend AC | St.Albans Striders |
| Striders of Croydon | Team Giant Helston | Thames Hare & Hounds |
| Theydon | TRA | tra.uk |
| Trail Running Association | Triple A Boys | Uk Netrunner |
| Vegan runners | VETS AC | WDAC |
| Wellingborough & District AC | Winchester & District AC | Windle Valley Runners |
| Worthing and district Harriers | Yaxley Runners | Zoom Triathlon |
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