Updates:
- June 14th: Added Tara Grosvenor, Verena Walter (WPRO), Michiel De Wilde, Marc Duelsen, Fabian Rahn, Evert Scheltinga, Joe Skipper, Markus Thomschke (MPRO)
- June 7th: Added Katrina Matthews (WPRO), Alexandre Blain, Andrej Vistica (MPRO), Sebastian Neef is no longer on the latest entry list.
- June 6th: Added Lisa Norden (WPRO), Michael Patrick Alonso Mckernan, Clemente Alonso McKernan, Thomas Davis, Nils Frommhold, Pieter Heemeryck (MPRO), Justine Mathieux and Axel Beci are no longer on the latest entry list
- June 4th: Ironman has announced that the UK travel restrictions (including quarantine) are likely to apply for Professionals racing IM UK. This could seriously impact the number of non-UK athletes who will race im Bolton.
- May 31st: Added Axel Beci, Tim Don, Wouter Monchy (MRPO)
- May 24th: Added Chantal Cummings, Justine Mathieux (WPRO), Leon Chevalier, Sebastian Neef (MPRO)
- May 19th: Added Imogen Simmonds (WPRO), Kyle Buckingham, Stefan Schumacher, Elliot Smales (MPRO)
- May 10th: Added Nikki Bartlett (WPRO), Nick Kastelein, Kevin Portmann, Till Schramm, Matt Trautman (MPRO)
- May 3rd: Added Adam Bowden, Sam Laidlow (MPRO)
Kona Slots and Prize Money
IM UK has 2m+2f Pro Kona slots. It has a total prize purse of 100.000 US$, paying 10 deep.
Male Race Participants
| Name | Nation |
| Clemente Alonso McKernan | ESP |
| Michael Patrick Alonso Mckernan | ESP |
| Reece Barclay | GBR |
| Axel Beci | ESP |
| Alexandre Blain | FRA |
| Adam Bowden | GBR |
| Kyle Buckingham | ZAF |
| Leon Chevalier | FRA |
| Thomas Davis | GBR |
| Michiel De Wilde | NED |
| Tim Don | GBR |
| Marc Duelsen | GER |
| Nils Frommhold | GER |
| Pieter Heemeryck | BEL |
| Nick Kastelein | AUS |
| Sam Laidlow | FRA |
| Wouter Monchy | BEL |
| Sebastian Neef | GER |
| Seppe Odeyn | BEL |
| Kevin Portmann | FRA |
| Fabian Rahn | GER |
| Evert Scheltinga | NED |
| Till Schramm | GER |
| Stefan Schumacher | GER |
| Joe Skipper (KQ) | GBR |
| Elliot Smales | GBR |
| Markus Thomschke | GER |
| Matt Trautman | ZAF |
| Hans Christian Tungesvik | NOR |
| Andrej Vistica | CRO |
Female Race Participants
| Name | Nation |
| Nikki Bartlett | GBR |
| Chantal Cummings | GBR |
| Tara Grosvenor (KQ) | GBR |
| Justine Mathieux | FRA |
| Katrina Matthews (KQ) | GBR |
| Lisa Norden | SWE |
| Imogen Simmonds | SUI |
| Verena Walter | GER |