BBC Video is NOT complete series in Series 5
If you look at the listings here, in series 5, there are TWO more episodes, Starbound and Endgame, NOT on the disc. I kept reading about an episode where Mrs Warboys rolls down a hill and a dog jumps on her and I didn't remember ever seeing that, so I compared it.
It really makes me mad when they claim it is the complete series but it's not.