| Circuit | Sigma 150 | Sigma 135 |
|---|---|---|
| Anglesey (Coastal) |
Jamie Ellwood
1:16.309 · Sep 2024
|
Paul Goldstein
1:17.543 · Sep 2024
|
| Anglesey (International) |
Stephen Clark
1:39.419 · Jun 2026
|
James Hapgood
1:41.442 · Jun 2026
|
| Brands Hatch (Indy) |
Harry Cramer
0:53.173 · Apr 2023
|
Ben Wheatley
0:54.098 · Apr 2023
|
| Cadwell Park |
Harry Senior
1:37.123 · Jul 2024
|
James Newman
1:38.581 · Aug 2026
|
| Castle Combe |
Thomas Horton
1:15.092 · Jun 2024
|
Jamie Winrow
1:16.174 · Jun 2024
|
| Croft |
William Van Es
1:31.115 · Jul 2026
|
James Hapgood
1:32.993 · Jul 2026
|
| Dijon |
Bren Maude
1:33.527 · September 2026
|
Thomas Gunter
1:34.251 · September 2026
|
| Donington Park (National) |
Paul Goldstein
1:17.827 · Mar 2025
|
Adam Kene
1:18.973 · Mar 2025
|
| Oulton Park (International) |
Max Haynes
1:53.531 · Apr 2025
|
Giles Derry
1:55.187 · Apr 2025
|
| Silverstone (GP) |
Callum McDougall & Oliver Smith
2:26.143 · May 2026
|
Tom McEwing
2:28.556 · May 2025
|
| Snetterton (300) |
James Sibbet
2:08.085 · Apr 2026
|
Steve Merritt
2:11.121 · Apr 2026
|
| Spa-Francorchamps |
Matthew Willoughby
2:51.695 · Jun 2023
|
Ben Wheatley
2:53.830 · Jun 2023
|
| Thruxton |
Harry Cramer
1:27.262 · Jul 2023
|
Richard Groom
1:28.593 · Jul 2023
|
| Zandvoort |
James Emson
1:55.010 · Jul 2025
|
Paul Goldstein
1:56.466 · May 2024
|
| Circuit | Sigma 135 | Sigma 150 | Sigmax |
|---|---|---|---|
| Anglesey (Coastal) | Jamie Winrow 1:17.355 · Sep 2022 | Stephen Clark 1:15.282 · Sep 2022 | Samuel Wilson 1:15.106 · Sep 2019 |
| Anglesey (International) | — | — | Martin Amison 1:38.930 · Apr 2014 |
| Brands Hatch (Indy) | Adam Harrison 0:56.004 · Jun 2019 | Chris Dear 0:53.503 · Jun 2019 | Dylan Stanley 0:52.466 · Jun 2016 |
| Cadwell Park | Jamie Winrow 1:38.710 · Apr 2022 | Harry Senior 1:36.284 · Apr 2022 | Jeremy Webb 1:36.655 · May 2015 |
| Castle Combe | — | — | Neil Shinner 1:14.128 · Sep 2015 |
| Croft | Dan Clayphan 1:33.969 · Jul 2020 | Luke Balmforth 1:30.899 · Apr 2019 | Samuel Wilson 1:29.340 · Apr 2019 |
| Donington Park (National) | James McCall 1:20.471 · Aug 2021 | Jamie Winrow 1:19.917 · Aug 2021 | Samuel Wilson 1:18.287 · Jun 2019 |
| Donington Park (Grand Prix) | — | — | Mark Johnson 1:46.796 · Jun 2017 |
| Knockhill | Jamie Winrow 0:57.526 · Jun 2022 | Harry Senior 0:56.328 · Jun 2022 | Glenn Burtenshaw 0:56.935 · Jun 2022 |
| Mallory Park | Marc Noaro 0:52.730 · Jul 2020 | John Benfield 0:51.670 · Jul 2020 | Harry Cramer 0:51.460 · Jul 2020 |
| Oulton Park (Island) | — | — | Paul Turley 1:36.386 · May 2013 |
| Oulton Park (International) | David Read 1:55.046 · Apr 2021 | James De Lusignan 1:53.109 · Apr 2021 | Simon Griffiths 1:52.560 · Apr 2021 |
| Pembrey (Clubmans) | Alaric Barney 1:11.360 · Sep 2021 | Harry Senior 1:08.837 · Sep 2021 | Stephen Clark 1:08.666 · Sep 2021 |
| Silverstone (Grand Prix) | Simon Shaw 2:29.520 · May 2021 | Jamie Winrow 2:26.591 · May 2021 | Stephen Clark 2:25.903 · May 2021 |
| Silverstone (International) | Ian Fortescue 1:16.351 · Oct 2020 | Harry Senior 1:14.462 · Mar 2022 | Harry Senior 1:14.526 · Oct 2020 |
| Snetterton (200) | James McCall 1:29.489 · Aug 2020 | Andrew Whitton 1:23.498 · Aug 2020 | Mark Gibson 1:24.219 · Aug 2020 |
| Snetterton (300) | Jamie Winrow 2:11.693 · Jul 2022 | Harry Senior 2:08.032 · Jul 2022 | Samuel Wilson 2:08.690 · Apr 2019 |
| Spa Francorchamps | — | — | Jamie Winrow 2:49.142 · Sep 2018 |
| Thruxton | Alaric Barney 1:29.320 · Jul 2021 | Gideon Wilkinson 1:26.995 · Jul 2021 | Harry Senior 1:26.347 · Jun 2021 |
| Zandvoort (Pre 2020) | Adam Harrison 2:03.345 · Jul 2019 | Barry White 1:58.729 · Jul 2019 | Neil Shinner 1:56.543 · Aug 2015 |
| Circuit | Classic | Sigma 125 | Mega | Sigmax |
|---|---|---|---|---|
| Anglesey (Original) | Andrew Smith 0:52.957 · Jul 2006 | — | Guy Halley 0:49.153 · Jul 2006 | — |
| Anglesey (Coastal) | Justin Cox 1:22.653 · Jun 2012 | Jamie Winrow 1:17.913 · Sep 2016 | Martin Amison 1:16.258 · Jun 2012 | — |
| Anglesey (International) | Trevor Harber 1:48.809 · Apr 2014 | Max Robinson 1:40.894 · Apr 2014 | Paul Turley 1:40.366 · Aug 2010 | — |
| Brands Hatch (Indy) | Graeme Smith 0:57.370 · Apr 2012 | Mark Gibson 0:54.320 · Jun 2016 | Myles Packman 0:53.275 · May 2011 | Stephen Arnell 0:53.392 · Apr 2023 |
| Brands Hatch (Grand Prix) | Justin Cox 1:54.499 · Aug 2009 | — | Simpson 1:44.960 · Aug 2009 | — |
| Cadwell Park | Matthew Willoughby 1:46.130 · Apr 2018 | Pete Yates 1:40.140 · May 2015 | Andrew Ennis 1:37.721 · Sep 2008 | — |
| Castle Combe | Graham Smith 1:21.035 · Sep 2015 | Jamie Winrow 1:17.106 · Sep 2015 | Declan Dolan 1:15.771 · May 2018 | — |
| Croft | Paul Hawker 1:41.217 · Apr 2019 | — | Kevin Barrett 1:33.036 · Apr 2019 | Thomas Horton 1:32.333 · Aug 2023 |
| Croix-en-Ternoise | Mike Welburn 1:04.67 · Jul 2004 | — | Guy Halley 1:01.29 · Jul 2004 | — |
| Donington Park (National) | Graham Smith 1:25.644 · Jul 2015 | Alex Gurr 1:21.951 · Mar 2014 | Luke Tzourou 1:20.121 · Jun 2019 | Thomas Horton 1:18.694 · Sep 2023 |
| Donington Park (Grand Prix) | Paul Hawker 1:58.861 · Jun 2011 | Jon Harmer 1:49.986 · Jun 2017 | Myles Packman 1:49.045 · Jun 2011 | — |
| Knockhill | Toby Briant 1:03.56 · Aug 2004 | — | Guy Halley 0:59.90 · Aug 2004 | — |
| Lydden | Graeme Smith 0:49.305 · Jul 2007 | — | Jamie Ellwood 0:46.407 · Jul 2007 | — |
| Mallory Park | Paul Manyweathers 0:55.31 · Apr 2000 | — | Nick Frost 0:51.875 · Sep 2007 | — |
| Oulton Park (Fosters) | Andy Coombs 1:14.471 · Jun 2006 | — | James Walker 1:07.921 · Jun 2006 | — |
| Oulton Park (Island) | Graeme Smith 1:45.132 · May 2013 | Amanda Black 1:40.979 · May 2013 | Martin Amison 1:37.087 · May 2009 | — |
| Oulton Park (International) | Amanda Black 2:05.336 · Sep 2012 | David Webber 1:57.171 · Aug 2016 | Paul Turley 1:55.549 · Sep 2012 | Thomas Horton 2:03.623 · Oct 2023 |
| Pembrey | Bob Willis 1:09.61 · May 2000 | Stephen Humphreys 1:05.289 · Apr 2013 | James Barlow 1:03.833 · Apr 2007 | — |
| Pembrey (New layout 2017) | Paul Hawker 1:16.853 · Apr 2017 | Gary Smith 1:11.267 · Apr 2017 | Roger Ford 1:09.861 · Apr 2017 | — |
| Rockingham (Historic) | Charlie Hunt 1:46.252 · Apr 2003 | — | Rachael Green 1:40.758 · Apr 2003 | — |
| Rockingham (International Short) | David Pearson 2:02.280 · Aug 2005 | — | Nick Frost 1:54.075 · Aug 2005 | — |
| Rockingham (International Sports Car) | Amanda Black 1:38.396 · May 2012 | David Webber 1:34.138 · May 2016 | Jamie Ellwood 1:31.678 · May 2012 | — |
| Rockingham (National) | Graham Smith 1:25.919 · | Tristan Judge 1:20.107 · | Brett Ray 1:19.186 · | — |
| Silverstone (National) | Flick Haigh 1:12.732 · Apr 2009 | Ian Dyble 1:09.226 · Apr 2011 | Martin Amison 1:06.269 · Apr 2009 | — |
| Silverstone (Grand Prix) | Graham Smith 2:42.073 · Jun 2015 | Jason Gale 2:32.857 · Jun 2015 | Declan Dolan 2:28.165 · May 2018 | — |
| Silverstone (International) | Robin Webb 1:23.056 · Oct 2017 | Nigel Board 1:18.909 · Jun 2014 | Kevin Barrett 1:16.682 · Mar 2019 | — |
| Snetterton (Pre 2011) | Edward Chinn 1:26.769 · Jun 2003 | Reece Somerfield 1:22.029 · Sep 2010 | Guy Halley 1:19.163 · Apr 2006 | — |
| Snetterton (300) | Graham Smith 2:22.727 · Sep 2014 | Scott Lawrence 2:13.687 · Sep 2014 | Brett Ray 2:10.027 · Sep 2014 | Thomas Horton 2:09.454 · May 2023 |
| Spa Francorchamps | Graeme Smith 3:07.886 · Sep 2013 | Nigel Board 2:56.561 · Oct 2016 | Luke Cooper 2:51.216 · Oct 2016 | Matthew Willoughby 2:51.695 · Jun 2023 |
| Thruxton | David Williams 1:35.75 · Sep 2000 | Peter Mullineux 1:29.251 · Jul 2018 | Ollie Jackson 1:26.811 · Sep 2006 | Kevin Barrett 1:27.933 · Jul 2023 |
| Zandvoort (Grand Prix) | Graham Smith 2:08.580 · Aug 2015 | Jon Harmer 2:00.407 · Jul 2017 | Declan Dolan 1:58.268 · Jul 2017 | — |
| Zolder | James Carvey 2:00.440 · Jun 2010 | Reece Somerfield 1:54.987 · Jun 2010 | Paul Turley 1:50.238 · Jun 2010 | — |