Labour leader Ed Miliband is the latest politician to be caught out on the cost of everyday items after he struggled to name the average cost of a weekly shop for a family, during an interview with Good Morning Britain.
David Cameron was tripped up last year when he claimed the price of budget supermarket bread was "well north of a pound", when at the time it was 47p.
He later claimed he did not know the price because he had a breadmaker at home.
London Mayor Boris Johnson told BBC presenter Jeremy Paxman that a pint of milk cost "about 80p or something like that".
Shortly after being elected Liberal Democrat leader, Nick Clegg was challenged by a caller on an ITV News local show about how much state pensioners received. The Deputy Prime Minister said "about 30 quid" when the figure at the time was £90.70 a week for a single person.
More top news
Fans can finally have their first look at Jared Leto's incarnation of the classic villain in 2016's Suicide Squad
Labour is promising to reverse the Conservative policy of privatisation in the NHS which it claims is creating longer waiting times.
The Queen and senior members of the monarchy will attend services around the world to commemorate the centenary of the battle of Gallipoli.