Hi again townie.
Do you know where on Garrison Lane the police station was situated? I used to help a mate out who had a car body shop back in the late 70's early 80's. Just up from the Sportsman Pub, next to the car tuning place. He had a customized Morris 1000 van, always parked on the road outside the workshop. It was about that time that the area was being demolished, with a few rows of houses by the Sportsman still standing.
There was also probably the last surviving grocery shop at the bottom of Garrison Lane opposite the park near the petrol garage. I don't recall the old police station, it may have been demolished years before.