LONDON, May 4 - In the Labour stronghold of Hackney in east London, human rights lawyer Nadeshda Jayakody is one of many voters switching to the Green Party, a trend among urban progressives that could cost British Prime Minister Keir Starmer dearly in the capital.As Starmer's Labour Party adopts tougher policies on issues like immigration in response to the rise of Nigel Farage's right-wing populist Reform UK party, it risks losing voters like Jayakody, for whom Labour had been a natural home."I just think the Greens align better with what I stand for," said Jayakody, 34, who voted Labour in...