All About Me (the Jasper Carrott one with the kid in a wheelchair) not only had 22 episodes but was created by the guy who created Peaky Blinders! That was My Family bad What about The House That Jack Built with Adam Faith in? I might be wrong and I don't want to cheat by checking but I'm sure that the BBC didn't show all 6 episodes.
I watched this again about a year ago on the 4player (or whatever it's called) aside from episode 5 not being there I was pleasantly surprised to find I still enjoyed it, the last episode is a bit weird because Frank turns into a complete dick for no apparent reason. If anyone watches it on 4play let me know if episode 5 is on there.