Rory Bremner going downhill

Mrs NotaSheep and I stopped watching the Rory Bremner programme a few years back when they moved from witty satire into political polemic. The two John's interview and interviewer were funny for the first two dozen or so sketches but now I can't even watch those parts. We did find ourselves watching a bit of Sunday's show however. After a few minutes of a sketch featuring David Cameron, Mrs NotaSheep turned to me and asked "Who is that meant to be?", I said "David Cameron" and she replied "In which case, why is the voice Keith Floyd?". As usual Mrs NotaSheep got it right and that's another part of the Rory Bremner show that I cannot listen to.