BRITAIN’S three female party leaders united yesterday to launch an alliance against Westminster austerity — but ruled out speaking for each other in TV election debates.

Scottish First Minister Nicola Sturgeon set out her “new approach to politics” in Parliament alongside Plaid Cymru’s Leanne Wood and Green Party leader Natalie Bennett.

Ms Sturgeon — dubbed the most powerful woman in British politics — was in London to meet Tory PM David Cameron for the first time since taking the reins from Alex Salmond.