蜜芽传媒

The Eurosceptic Tory MP Douglas Carswell defects to UKIP and resigns his seat to fight a by-election. We speak to the UKIP leader Nigel Farage, the Conservative Eurosceptic Bernard Jenkin, and the 蜜芽传媒's political editor Nick Robinson.

Net migration into the UK increased by 68-thousand in the year to 2014. Our home affairs correspondent, Danny Shaw, explains the figures.

The Deputy Prime Minister Nick Clegg has joined calls for South Yorkshire's Police and Crime Commissioner Shaun Wright to resign over the Rotherham child abuse scandal. We hear from a victim of the abuse, the father of another victim, and the man now overseeing the safeguarding of children in Rotherham - Steve Ashley.

Also, a woman who was sexually assaulted on the London Underground tells her story; and British Transport Police on how they're tackling these types of offence.

And our latest Letter to London - from the Scottish author Ewan Morrison.

Presented by Edward Stourton.