The seasickness pills Toni buys Lance are called "herl-ovadec" [hurl over deck].
When Andy and Becky are in the garage talking about eventually getting their own home, and Andy is looking forward to having a shed again, he says, "Terry has two sheds", this is partly a nod to Terry Jones who plays Arthur Two-Sheds Jackson in the Monty Python sketch of the same name.
Second time that real life mother and daughter, Diana Rigg (Veronica) and Rachael Stirling (Becky), have played Mother and Daughter. The previous was in Doctor Who's "The Crimson Horror (2013)".
Laura Checkley (Louise) & Alexa Davies (Kate) also worked together on Cradle to Grave (2015) as Lil & Yvonne respectively.