蜜芽传媒

Jeremy Corbyn insists the "real issue" is the part the UK plays in the international non-proliferation treaty - a part he doesn't think we're exercising sufficiently to date.

The Labour leader told Andrew Marr he would never "press the button" to launch nuclear weapons, and he adds: "I don't think David Cameron would either."

He also raises the possibility that Trident submarines could be used without nuclear warheads,.