I love you Hatfield!
I lived one street over from the Martin's house while I was going to Uni in Hatfield. Was not about when the filming was going on cos they did it in the summer, but it really is one odd town.
Over the years we were there almost every one of my mates got mugged and I even got attacked by a seven year old who jumped out of a tree at me to steal my bag of crisps! (I held on to them tight and he didn't get them! Ha ha! They were Monster munch afterall- the nice flavour!) Everything But the Girl even wrote a song about the town (Hatfield 1980) Won't go into details but the content does nothing for the towns tourism!
All this, and yet we really loved it and spent three very happy years there. Long live the Galleria, Fattys restaurant and Hatfield House! In my opinion, way more films should be set there!