FIA Group 5 1970 to 1973 – FIA Group 2 1974 to 1983 – FIA Group 1 1983 to 1990 – FIA Group A 1991 to 2000 – 2 Litre Touring Car Formula, later becoming FIA Super Touring 2001 to 2011 – BTC Touring. The BTCC developed and introduced this specification in 2001, in response to the spiralling costs of the Super Touring specification. However, with the Super 2000 specification being used in the newly reformed World Touring Car Championship, the popularity of the BTC-T spec with top teams and manufactures was short lived. Therefore, from the 2007 season, BTC-T spec cars were no longer allowed to win the championship outright. The 2010 season was meant to be the last year BTC-T cars would be eligible to enter the championship, however Series Director Alan Gow announced a one-year extension to allow BTC-T to compete in 2011 (with their base-weight +50 kg on the 2010 season). Only cars that competed in 2010 would be eligible to race in 2011. 2004 to 2013 – Super 2000. Regulations first introduced to the BTCC in 2004, allowing teams to build cars eligible to race in several different Touring Car Championships, including the World Touring Car Championship. Car built to this specification were eligible to compete until the end of the 2013 season, however the last fully S2000 cars were entered in the 2011 season. 2010 to 2013 – S2000/NGTC Hybrid. From the 2010 season, teams with S2000 chassis were allowed to use an NGTC engine with their car. As of the 2012 season, all teams with S2000 chassis, used NGTC turbo charged engines. This hybrid specification was eligible until the end of the 2013 season. Circuits Being a national championship, the British Touring Car Championship has visited circuits throughout the United Kingdom over its long history. Currently the series visits eight different tracks in England and Scotland over the course of ten meetings. These tracks are: Brands Hatch (Indy Layout), Donington Park, Thruxton (the fastest track ever visited by the BTCC, with an average speed of 111.31 mph, set by Andrew Jordan during qualifying in 2014), Oulton Park, Croft, Snetterton, Knockhill, and Silverstone (National and International layouts), with a return to Brands Hatch (GP Layout) at the end of the season. In the past, the BTCC has visited Mondello Park in Ireland and Pembrey in Wales. A street race around the city of Birmingham