Which "style of humour" is this? when became popular this style and what it represents?

I would call it absurdist humour, i think there's a whole heap of sarcasm in there, a tad of witty repartee, but in the main i'd call it absurdist, pythonesque maybe, after the tradion of absurdist humour first brought about by the Monty Python team, and the father of it all Spike Milligan, could even be the type of thing Reeves and Mortimor would say, so there is a lot of Britishness in that due to the droll absurdity of it all.