The Likely Lads

Although the film is or was 1976,(released?) would anyone know if it was filmed in that year, as sometimes the actual filming of movies takes place the year before?,it was a great film in my view, and summed up the era very well,its amazing that is about thirty years since its making,i think it was also the best thing they did, as the TV series of them seemed to get in to a bit of a rut, i wonder what other people think,was the rumour true that the pair never spoke to each other off screen and generally hated each other!i see Rodney was on TV the other day looking very much older, any info about the filming would be a great help, thanks, Geoff.