The classic Aston Martin seen in the Bagleys' garage belonged to writer/director Bruce Robinson. A 1961 DB4 Convertible of which only 70 were made, he owned it for 30 years and it was auctioned off in 2008.
After Bagley has lunch with his wife, she drops him back at the advertising firm's office building, but it is a different building to the one used for the interior scenes, which is the tall red building several hundred yards up the street (visible in the crane shot of their car pulling up), right next to the Lambeth bridge, as we can see from the window view in the scenes in Bagley's and Bristol's offices.
During the anniversary party, the strap on Julia's dress changes shoulders for one scene. When the dress is on the opposite shoulder, it looks a different colour as well.
Penny Wheelstock: You dislike me because I'm not one of those starved little tarts you exploit. I don't rush out and buy your latest makeup, I have a mind of my own and I have a body of my own that doesn't fit into the preconceived patterns men like you dictate.