The Mike Yarwood Christmas Show 1978

On election night 1979, the BBC filled some of the time between the polls closing and the first results with a repeat of Mike Yarwood's Christmas special from the previous year - presumably because it was full of impressions of politicians.
This recording is taken from that 1979 repeat, which is why it opens with about a minute of the election coverage before David Dimbleby seamlessly segues into the light-ent.