The Boat Race public tests are in November at the British Indoor Rowing Championships, where each university sends around 20 rowers to compete. Everyone races 2 km on an indoor rower with the club presidents using adjacent machines. Both universities also send crews to the Head of the River Fours race in London, which is raced over the reverse Boat Race course, that is to say the Championship course from Mortlake to Putney. In December, the coaches put out "Trial Eights" where two crews from the same university race each other over the full Boat Race course. These crews are given names such
Mortlake of the Council. Richmond Park, the constituency which includes Mortlake, had changed from Liberal Democrat to Conservative in the 2010 general election, was recaptured by the Liberal Democrats in the 2016 by-election, and finally reverted to Conservative MP Zac Goldsmith in the 2017 general election by a margin of only 45 votes. The London Assembly constituency South West, which includes Mortlake, is represented by former local councillor Tony Arbour (Conservative). The place-name 'Mortlake' is first attested in the Domesday Book of 1086, where it appears as "Mortelaga" and "Mortelage", a name with two possible derivations. If the second element is