Central Scottish BE375, RHN946F, a Bristol FLF6G built in 1968 with ECW H38/32F bodywork.
This had taken part in the vehicle swaps between NBC and SBG when Bristol VRs came south and Bristol FLFs went north. Former United 546 found a new home in the Glasgow area. The clippie was having to hurry to catch her bus!
Photo taken by Donald Hudson, July 1977, Buchanan Street Bus Station, Glasgow