This one took a bit of searching... The main character, Miri (who's attempting to rebuild her life after 18 years in prison) has a Sanyo M-X315L in her bedroom: I only recognised it at all because one of my mates had one in the early 1980s...
...& Miri also uses a Philips D8097 - to communicate with her parents when she finds out her mum had been having an affair with her ex-boyfriend while she was in prison! British comedies are a hoot