Demonstrators march on a Slutwalk on June 4, 2011 in Glasgow, Scotland. Glasgow's first ever slut walk made its way through the town center streets in a bid to raise awareness about commonly-held attitudes towards rape and sexual assault.
Justice Secretary Kenneth Clarke has been battling to save his job after appearing to suggest there was a distinction between "serious rape" and other forms of the crime.
The former shadow finance minister was taking part in a BBC radio phone-in on Wednesday when he replied to host Victoria Derbyshire's assertion that "rape is rape" by saying "no, it's not".
Clarke later clarified he believed "all rape was a serious crime" but only said it was a "mistake" if his comments had "given any other impression" and refused to say sorry, angering women's rights groups.