The food that Stefan (Mark Strepan) is eating for breakfast when Rash (Ben Tavassoli) asks, "how can you eat that crap?", is blood sausage.
Mark Bonnar (Peter Mayhew) & Henry Pettigrew (Bruce Lockwood) also worked together on Line of Duty (2012) as Dryden & Cole respectively, as well as on two episodes of Shetland (2013) as Duncan Hunter & Iain Redford respectively.
Mark Addy (DS Derek Sands) & Aiysha Hart (Leila Sayyad) also worked together on Atlantis (2013) as Hercules & Ariadne respectively.