Chuka Umunna storms out of Sky News interview after clashing with Dermot Murnaghan

Chuka Umunna, Labour's shadow business secretary, walked out of a live Sky News interview after he clashed with presenter Dermot Murnaghan over the letter sent to UK mosques about extremism.

Mr Umunna accused Murnaghan of being "a bit ridiculous" when he was repeatedly asked about his thoughts on the issue.

The MP said he was asked on to the show to talk about David Cameron's speech on the economy and would not speak "off-piste" about whether the letter was "patronising" without having read it.

After Murnaghan accused him of not giving an answer until "you get the party line right", Umunna stood up, threw his arms up in frustration and walked out of the interview.

At one point in the heated exchange, Murnaghan invited the shadow business secretary to "come back on in half-an-hour's time" once he had read the letter.

Umunna replied: "I don’t think you’re being terribly fair. Your viewers can make their own decision.”

Prompting the MP's exit, Murnaghan then said: “So you’re not going to speak until you get the party line right – ok, well we’ll have to end it there. Shadow business secretary, thank you very much indeed.”