Farthing Corner it is KeithG, in the days of Top Rank, hence the green and white uniforms.
The four rows of pumps were different brands, petrol one side of the service building, diesel on the other. The queues on Sunday evening were huge, and even with almost one attendant to two pumps plus three manning the tills and oils, it was absolutely manic for hours.
As shoot999 said, we always offered to check oil as the tear off strips on the cans had a points mean prizes value.
This was taken on North side, coast bound, where there was a small garage structure as you exited the pumps. Some very minor repairs were carried out by the resident mechanics. In the back of it was a length of gutter and a wall mounted can opener. The empty oil cans were opened and left to drain and the resulting mixture used on the Bedford CA(?) minibuses that used to transport the workforce to and from this otherwise fairly inaccessible spot in 1966.
The mechanics drove the minibuses, usually like they stole them, and with the front sliding doors wide open. No seat belts, so scary but fun, a bit like a roller coaster ride home.
