 Braine was a campaigner for the Referendum Party in the 1990s, and since the party's demise in 1997 has supported UKIP.During the 2016 EU referendum, Braine served as a borough manager for pro-Brexit organisations Vote Leave and Grassroots Out (GO) in Kensington and Chelsea, leading a group of ninety volunteers.Braine has stood as a UKIP candidate in local, general and European Parliament elections.