750 Motor Club opened entries for the 2026 Birkett Six-Hour Relay Race on 14 July, with entry packs available through the event's official page.
The relay uses the full Silverstone Grand Prix circuit and brings together teams of three to six cars and drivers. The club said the race could accommodate up to 70 teams, amounting to around 300 competitors.
The Birkett has been running since 1951. For the 2026 edition, 750MC announced returning Alpha Live coverage and new broadcast graphics from Go for the Gap.