Question Time in the House of Commons is an opportunity for MPs to question government ministers about matters for which they are responsible.
Prime Minister's Question Time, also referred to as PMQs, takes place very Wednesday that the House of Commons is sitting and gives MPs the chance to put questions to the Prime Minister.
In most cases, the session starts with a routine 'open question' from an MP about the Prime Minister's engagements. MPs can then ask supplementary questions on any subject, often one of current political significance.
Opposition MPs follow up on this or another topic, usually led by the Leader of the Opposition, Edward Miliband. Usually, he is the only MP allowed to come back with further questions.