Brilliant film, got it on DVD. Unusual because at the time most UK films still came out of Pinewood. This film was entirely in the regions, starting in Hull with the school and train station, then it literally went from there to Norwich as it was filmed - the next stop was at Grimsby Hospital where his wife picked up the old ladies, and petrol station drive off was there too. Then it went to Bourne and Cromer, before ending up in Norwich for the conference.
So it was literally filmed on location! (Factiod about the DVD - the start of the film still has the Thorn EMI logo that flashes up, the same logo that was plastered on most TV's and the first mass produced videos in the UK at the time).