1. Only Fools and Horse, one of the only shows I have found to have an equally awesome beginning and end song.
2. Young Ones
3. Red Dwarf, we can still list an end theme right? Well others used it and I am as well.
4. Are You Being Served
5. Absolutely Fabulous, not sure if this fits or not since there were versions with and without lyrics and I really can't remember which was used more often.
Oddly, I am an American but all my picks are from the UK.