The Rook one was great.
I was never too keen on there musical sketches, but one of them was so good, I will rank it as my favourite Two Ronnies sketch. It was the one where they are morris dancers and they accidently put rude words in the song they sing. I think it is called The St. Botolph's Country Dance Team. It is pure genius.
I also love the name droppers sketch, when Ronnie Corbett gets a mention, 'Died last week' 'Surely not' 'Shirley Not was as the funeral. Her problem is she's obsessed with her horriscope' 'Horris Scope, that twit. Don't tell me she moves in his beronicorbit' 'Ronnie Corbett who's Ronnie Corbett'