Times columnist and former Conservative MP Matthew Parris says it is refreshing to hear politicians use language that has not been culled from a staff training manual.

BBC: David Cameron

As well as politicians, the campaign is backed by other high-profile figures, including singers Elton John and George Michael, and journalist and former Conservative MP Matthew Parris.

BBC: UK party leaders back global gay rights campaign

Political commentator and former MP Matthew Parris - whose marathon PB of 2:32:57 is still a House of Commons record - is not sure anybody could let their PB slip their mind.

BBC: Paul Ryan marathon claim: Would you fib about your PB?

There's also an intriguing looking session of the Committee on Members' Expenses, which is looking at reform of the MPs' expenses watchdog, IPSA. The witnesses are Ira Madan, Houses of Parliament Consultative Occupational Physician and then eminent journalists Peter Riddell, and Matthew Parris.

BBC: Viewing guide: The coming week's highlights in Parliament