When Strike returns to Quine and Fancourt’s Talgarth Road house with Robin along, he buys “two takeaway coffees in the Metro Café that stood in the [Barons Court] station building.”
Here’s the Metro Café. Although there’s no sign saying so, we asked the fellow behind the counter just to make sure.
They make a mean white flat at Metro! If you’d like one yourself, here it is on Google maps:
(It’s in the same building as Barons Court Tube station.)