Families of soldiers who were killed in Iraq have urged Sir John Chilcot's Iraq Inquiry panel to quiz Gordon Brown over his funding for the frontline.
Appearing before the inquiry on Friday, he is expected to be grilled on his involvement during the Iraq invasion in 2003 - at the time he was Chancellor.
Families have urged Sir John to question the Prime Minister on the continued use of Snatch Land Rovers, despite alleged evidence proving they were inadequate in protecting troops.
Over 30 soldiers died while on patrol in the vehicles. The Snatch Land Rovers were eventually replaced by Mastiff armoured vehicles.
An earlier appearance at the Chilcot Inquiry saw former Ministry of Defence Permanent Secretary Sir Kevin Tebbit claim that Gordon Brown had "guillotined" defence spending shortly after the invasion.
He claimed that, as Chancellor, Brown cut the equivalent of around £1 billion, forcing him to work within an emergency budget.
Source: ITN News