Well, French & Saunders did an absolutely cracking parody of it once, this has got to be a 90's video but the quality is pretty good. For those in the UK that used to watch NHP for the full hour, this will amuse and make you laugh, one of the best comedy sketches i've seen in a long time
*Note* The gunging of Felicity Kendal does not happen until the end, but it's worth watching the whole sketch - it's proper funny
of course the pair in dungarees are Mel and Sue, or Mel Giedroyc and Sue Perkins, who went on to host Light Lunch and the Mel and Sue Show amongst other things.