On 11 May 2007 , after months of speculation , Gordon Brown formally announced his bid for the Labour leadership .
On 11 May 2007 , after months of speculation , Gordon Brown formally replaced Tony Blair as Prime Minister on 27 June 2007 .
On 11 May 2007 , after months of speculation , Gordon Brown formally announced his bid for the Labour leadership and replaced Tony Blair as Prime Minister on 27 June 2007 .