Former London mayoral candidate Zac Goldsmith is seeking to return to parliament as Conservative MP for his former constituency.
Mr Goldsmith was ousted as MP for Richmond Park during a by-election in December.
He had previously left the Conservative party in protest at the government's backing of a third Heathrow runway.
Local Conservative party members meet on Wednesday night to choose between Mr Goldsmith and two other candidates.
Mr Goldsmith, the Conservative party's 2016 candidate for Mayor of London, is up against Luke Parker - the party's 2015 General Election candidate in Brent North - and Laura Farris, a barrister.