British GT Championship
The British GT Championship is a sports car racing series based predominantly in the United Kingdom. The series was originally created by the British Racing Drivers' Club in 1993 and, for its first two seasons, was known as the National Sports GT Challenge. The series is currently run by the Stéphane Ratel Organisation, while Pirelli began its first season as the championship's official sole tyre supplier in 2016.
Two classes currently compete in the championship: GT3 and GT4. A consolidation of GT regulations and significant manufacturer support saw British GT first introduce a GT3 class in 2005. The category later mirrored that of the FIA GT3 European Championship and has used near-identical regulations from 2006 onwards. GT3 rules include extensive performance balancing and handicap weights to make cars artificially more equal. Cost-saving measures saw the series' previous premier class, GT2, phased out at the end of 2006.
The FIA GT4 class was adopted in 2008 as a stepping stone towards GT3. Regulations governing GT4 ensure the cars more closely resemble their road-going counterparts than GT3 machines. This replaced the unique GTC category. British GT has featured a number of other classes since its inception, including GT1.
Champions
The following drivers have previously won the British GT championships in their respective classes. An overall championship for all classes combined was also awarded until 1998, and those champions are marked with italics.| Year | Class | Champion | Car |
| 1993 | A |  Charlie Cox | Ford Escort RS Cosworth |
| 1993 | B |  Nigel Barrett | Porsche 911 Carrera SC |
| 1993 | C | John Greasley | Porsche 935 Replica |
| 1993 | D |  Thorkild Thyrring | Lotus Esprit S300 |
| 1994 | A | Ross Hyett | Porsche 935 Replica |
| 1994 | B | Thorkild Thyrring | Lotus Esprit S300 |
| 1994 | C | Nigel Barrett | Porsche 911 Carrera SC Porsche 911 Carrera RS |
| 1995 | GT1 | Thorkild Thyrring | De Tomaso Pantera |
| 1995 | GT2 | Chris Hodgetts | Marcos LM600 |
| 1996 | GT1 | Ian Flux Jake Ulrich | McLaren F1 GTR |
| 1996 | GT2 | David Warnock Robert Schirle | Marcos LM600 |
| 1996 | GT3 | Ken Thompson | Darrian T90 |
| 1997 | GT1 | John Morrison John Greasley | Porsche 911 GT1 |
| 1997 | GT2 | Steve O'Rourke Tim Sugden | Porsche 911 GT2 |
| 1997 | GT3 | Simon Tate | Marcos LM500 |
| 1998 | GT1 | Steve O'Rourke Tim Sugden | McLaren F1 GTR |
| 1998 | GT2 | '' Kurt Luby Richard Dean | Chrysler Viper GTS-R |
| 1999 | GT1 | Julian Bailey Jamie Campbell-Walter | Lister Storm GTL |
| 1999 | GT2 | David Warnock | Porsche 911 GT2 Lister Storm |
| 2000 | GT | Calum Lockie | Marcos LM600 |
| 2000 | GTO | Mark Sumpter | Porsche 911 GT3-R |
| 2001 | GT | David Warnock Mike Jordan | Lister Storm |
| 2001 | GTO | Kelvin Burt Marino Franchitti | Porsche 911 GT3-RS |
| 2002 | GT | Ian McKellar Thomas Erdos | Saleen S7-R |
| 2002 | GTO | Jamie Davies | Ferrari 360 N-GT |
| 2003 | GTO | Tom Herridge | Mosler MT900R |
| 2003 | GT Cup |  Matt Griffin Patrick Pearce | Porsche 911 GT3 Cup |
| 2004 | N-GT | Jonathan Cocker | Porsche 911 GT3-RSR |
| 2004 | GT Cup |  Ni Amorim Adam Wilcox | Ferrari 360 Challenge |
| 2005 | GT2 | Andrew Kirkaldy Nathan Kinch | Ferrari 360 GTC |
| 2005 | GT3 |  Dimitris Deverikos Piers Masarati | Porsche 911 GT3 Cup |
| 2006 | GT2 |  Chris Niarchos Tim Mullen | Ferrari F430 GT2 |
| 2006 | GT3 |  Leo Machitski | Aston Martin DBRS9 |
| 2006 | GTC | Matt Allison Jonny Lang | Porsche 911 GT3 Cup |
| 2007 | GT3 | Bradley Ellis Alex Mortimer | Dodge Viper Competition Coupe |
| 2007 | GTC | Jamie Smyth Graeme Mundy | Porsche 911 GT3 Cup |
| 2008 | GT3 | James Gornall Jon Barnes | Dodge Viper Competition Coupe |
| 2008 | GT4 | Matt Nicoll-Jones Stewart Linn | Ginetta G50 |
| 2009 | GT3 | David Jones Godfrey Jones | Ascari KZ1-R |
| 2009 | GT4 | Jody Firth | Ginetta G50 |
| 2009 | SS | Marcus Clutton Phil Keen | KTM X-Bow |
| 2010 | GT3 | David Ashburn | Porsche 997 GT3 R |
| 2010 | GT4 | Christian Dick Jamie Stanley | Ginetta G50 |
| 2011 | GT3 | Glynn Geddie Jim Geddie | Ferrari 430 Scuderia GT3 Ferrari 458 Italia |
| 2011 | GT4 | Peter Belshaw Marcus Clutton | KTM X-Bow |
| 2012 | GT3 |  Daniele Perfetti Michael Caine | Porsche 997 GT3-R |
| 2012 | GT4 | Jody Fannin Warren Hughes | Ginetta G50 |
| 2012 | GTC | Gary Eastwood Ryan Hooker | Ferrari 458 Challenge |
| 2013 | GT3 | Andrew Howard | Aston Martin V12 Vantage GT3 |
| 2013 | GT4 | Rick Parfitt Jr. Ryan Ratcliffe | Ginetta G50 |
| 2013 | GTC | Andy Schulz Paul Bailey | Ferrari 458 Challenge |
| 2014 | GT3 | Marco Attard | BMW Z4 GT3 |
| 2014 | GT4 | Jake Giddings Ross Wylie | Aston Martin V8 Vantage GT4 |
| 2015 | GT3 | Andrew Howard Jonathan Adam | Aston Martin V12 Vantage GT3 |
| 2015 | GT4 | Jamie Chadwick Ross Gunn | Aston Martin V8 Vantage GT4 |
| 2016 | GT3 | Derek Johnston Jonathan Adam | Aston Martin V12 Vantage GT3 |
| 2016 | GT4 | Graham Johnson Mike Robinson | Ginetta G55 GT4 |
| 2017 | GT3 | Rick Parfitt Jr. Seb Morris | Bentley Continental GT3 |
| 2017 | GT4 | Stuart Middleton William Tregurtha | Ginetta G55 GT4 |
| 2018 | GT3 | Jonathan Adam Flick Haigh | Aston Martin V12 Vantage GT3 |
| 2018 | GT4 | Jack Mitchell | BMW M4 GT4 |
| 2019 | GT3 | Jonathan Adam Graham Davidson | Aston Martin Vantage AMR GT3 |
| 2019 | GT4 | Tom Canning Ashley Hand | Aston Martin Vantage AMR GT4 |