Avon, who the Beauvoir company was based on, were happy for their name to be used in the show but BBC lawyers got a bit nervous according to an interview in the book with episode writer and co-creator, Ashley Pharoah. Hence the cosmetic name change!
The 8 Coronation Street actors/characters in this episode are: Chris - Marshall Lancaster (Slug). Doris - Noreen Kershaw (Tracey Spencer, and directed 102 episodes). Heather - Katherine Kelly (Becky McDonald). Denise - Georgia Taylor (Toyah Battersby). Carol - Eva Pope (Tanya Pooley). Mrs Luckhurst - Clare McGlinn (Charlie Ramsden). Edith - Meryl Hampton (Susan). Twilling's Lawyer - Andrew Redman (Judge).
Correction...there are 8 ex-Coronation Street actors in this episode.