Being a London MP could 'count against' Thornberry in deputy leadership race, says Baroness Harman

Being a London MP could "count against" Dame Emily Thornberry in the race to become Labour's deputy leader, ex-minister Harriet Harman has told Sky News.

Dame Emily, who has been the MP for Islington South and Finsbury since 2005, confirmed she will stand for the deputy leadership in a social media post on Tuesday. The chair of the Foreign Affairs Committee vowed to be "a voice for the membership, unions, PLP, and our constituents - not just nod along" if she is elected deputy Labour leader on 25 October.

Politics latest: Fourth Labour MP enters race to be deputy leader But Baroness Harriet Harman told Beth Rigby's Electoral Dysfunction podcast that the location of Dame Emily's constituency could pose a problem for the would-be deputy. She said the fact Dame Emily represents a London borough could "count against" her.

"I think traditionally, if you look at who the party's chosen, they have chosen somebody from a different part of the country to the leader, in order to create reach," Baroness Harman said. Angela Rayner, who resigned from the deputy position last Friday, is the MP for Ashton-under-Lyne in Greater Manchester.

Ruth Davidson, Electoral Dysfunction co-host and former Scottish Conservative leader, agreed that having a prime minister, deputy prime minister and deputy Labour leader "that all live and represent within two miles of each other" is "not so great" for Britons who live outside the capital. ???? Click here to listen to Electoral Dysfunction on your podcast app ???? She said those outside London "already think the city is overrepresented in government, transport and politics and media and, you know, EastEnders and everything else".

Another declared candidate for the Labour deputy leadership - left-wing member Bell Ribeiro-Addy - is also an inner London MP. Ms Ribeiro-Addy has the backing of the Socialist Campaign Group (SCG), which met in Westminster on Monday night to coalesce around one candidate following criticism of the contest's rules.

Read more:Would-be Labour deputies woo the unions in BrightonRayner 'won't get involved' in race to choose successorLabour 'failing to deliver change that people voted for' Meanwhile, Bridget Phillipson, the education secretary, has become the first cabinet minister to announce their candidacy to succeed Ms Rayner. In a statement on Tuesday morning, the MP for Houghton and Sunderland South pledged to "unite our great party and deliver for working people.