Continuity mistake: In the Daffyd sketch, Daffyd has two nipple piercings. As those other gay men come through the door and he pushes them back, his right nipple ring has moved up his body - obviously a clip on. It stays there for a few moments, until the next shot where it's back on his nipple, with no time to put it back on.
Continuity mistake: In the sketch with the Prime Minister, when Sebastian brings over the chocolate fingers, a shot before he brings them over there is nothing on the table. When Sebastian puts them on the table suddenly a cup has appeared. He did not bring over a cup and put it on the table, just the plate.