In the cafe, Compo slurps the tea from his saucer, then adds more tea to it from his cup. The camera changes to Ivy, then back to Compo, who pours tea again into his saucer. He didn't drink it when the camera was on Ivy because we would have heard him. He's a noisy slurper.
Foggy says to the studio guard, "Do you know who tomb you are speaking?", instead of ..."to whom..."