BBC4 are currently repeating the whole series of this.
Last night (3rd April 2014) they showed the first episode, Tomkinson's Schooldays" which has always been one of my favourites from the series.
Very Python like, as you would expect, and still very funny, though not all of it "worked".
One scene made me laugh where all the boys are in woodwork class making "scale models" of ships about a foot long.
The teacher (Terry Jones) turns and sees Tomkinson (Michael Palin) hanging from the side of a full sized ship (obviously filmed in a real shipyard).
"What's that Tomkinson?", "It's an Ice Breaker sir", "That's not a scale model", "Its a full size scale model sir", "Well melt it down", "But sir there is 17,000 tons of steel in her".
Note there was actually two series of this, the first had 6 episodes, the second was supposed to have 6 but after making 3 the BBC would not give them any more money so they stopped after 3 (they were expensive to make compared to other TV comedy shows at the time - lots of locations shots and made on film rather than video tape).