Kiran Sonia Sawar (Farah) & Anthony Welsh (Joe) also worked together on episode 4.3, Crocodile (2017) of Black Mirror (2011) as Shazia Akhand & Anan Akhand respectively.
Amber's phone says Saturday March 6th. March 6th 2019 fell on a Sunday so this must have been set in 2018.
Amber's birthday is March 6th which makes her a Pisces.
Anthony Welsh and Niamh Algar both appeared in the film Calm With Horses (also 2019).