Fast Sprinter?

Not really, as it was actually braking during its palatial passage through Pollokshaws West, not doubt running under cautionary signals, though could be heard revving off into the distance as it disappeared round the curve. 156462 passes a stationary 156507 + 513, working 1A02 the 1213 Glasgow Central to Kilmarnock semi-fast (running non-stop to Barrhead).

Done