The B272 is a relatively long B-road in south London.
The route starts at traffic lights on the A23 at Streatham Common. From here it winds through Merton until it crosses the A236 on Mitcham Common, at a junction which was the road's original northern end. It continues south along Beddington Lane to Beddington where there is a short multiplex east along the A232. A short distance further on, the road meets the B271 near Wallington.
Originally the B272 continued straight on across Croydon Airfield with the road crossing the taxiway at grade. Later in the 1920s the decision was made to close the road for obvious reasons. Despite the fact that the airfield closed in the 1950s and is now a housing estate, the old road has not been rebuilt.
The B272 multiplexes west for a short distance along the B271 before heading south around the original perimeter of the airfield before rejoining its original line and heading into Purley where it ends on the A2022. Before the latter road was inaugurated in the 1970s the B272 continued back to the A23.