2018 British GT Series
British GT racing series for FIA GT3 and GT4 cars with two drivers per car, these days run by the SRO using Blancpain BoP.
Three race meetings feature 2 x 60 minute races.
Three race meetings feature 1 x 120 minute race.
And the Silverstone 500 is a 180 minute enduro.
Google/iCal Calendar links: ICAL -or- HTML
For more championships click here.