The last appearance by Paul Ritter as Billy Cartwright leaving Joe Ashworth and Vera herself as the only characters to appear in every story to date.
Christine Bottomley (Lisa Strachan) & Jill Halfpenny (Maggie Warnock) also worked together on In the Club (2014) as Vicky & Diane respectively.
Brenda Blethyn and Angela Curran both appeared in the film Secrets And Lies but didn't appear in any scenes together.