I've never seen 'The Inbetweeners'. I did watch and enjoy 'Friday Night Dinner', but when I read about it on Wikipedia, I got a touch confused. It said that the mother was played by Tamsin Greig, whom I remember, but in that case, who did Rebecca Front play, and why wasn't she mentioned? Turned out I was confusing it with 'Grandma's House', another middle-class Jewish family sitcom, which I also enjoyed.