The Doctor mentions using Nitro 9. Nitro 9 was invented by Ace, a companion of the 7th Doctor.
Daniel Lewis' energy bill is addressed to 37 Granger Street, Anfield, Liverpool, United Kingdom L4 5GK. Liverpool FC's Anfield stadium is visible from the street.
Scouse is an accent and dialect of Liverpool.
Jodie Whittaker (Thirteen) and Jacob Anderson (Vinder) previously worked together in 6 episodes of Broadchurch (2013) and in the TV movie Royal Wedding (2010).