Character mistake: Joyce announces to Monty that she is getting married by "the only other person she kissed in the last ten years" (meaning Sir Henry from the consulate). However, that's wrong because she kisses Cyril Babcock on the beach in an episode of Series 6.
Episode #3.6 - S3-E7
Character mistake: Shaun Foster Conley is credited as "Himself". Himself has been misspelled "Himslef".