When does The Two Ronnies return?

The Two Ronnies is a British television comedy sketch show starring Ronnie Barker and Ronnie Corbett. It was created by Bill Cotton and aired on BBC1 from 1971 to 1987. The show featured comic sketches in which Barker and Corbett appeared both together and separately, with various additions giving the programme the feeling of a variety show. It had many notable writers including Ray Alan, John Cleese, Barry Cryer, Spike Milligan and David Nobbs.