Great Western Coffee Shop

I've been watching (again on Talking Pictures this excellent series  (https://www.imdb.com/title/tt0058842/?ref_=fn_al_tt_1)starring Alfred Burke as private detective Frank Marker, who moves from Brighton to Eton to Chertsey. (The earlier episode have been "lost". >:()

There've been scenes at various stations, including King's Lynn, Brighton, Windsor & Eton and Maidenhead, and I have the vaguest idea that in the opening shots for one series Marker was walking down a road at the bottom of a retaining wall close to Windsor Station on the  Slough branch.*

In last night's episode, Markey was viewing a closed "Apollo Aerials" premises next to Chertsey Station, which became his office for the last episodes.

Googling "Public Eye Chertsey Station" takes one to several websites and the second image that was offered to me was of a concrete signal box at Waterloo.

* A post on Railforums.co.uk corrects me: "The Road ...is Marsh Farm Road in Twickenham, the railway is about to go over the flyover crossing the Waterloo-Staines line just west of Twickenham. The subway connects Marsh Farm Road and Lion Road which run parallel to the Kingston Loop Line."