The A297 is a short link road in south London.
Morden Hall - Rosehill
The road starts at a roundabout on the A24 outside the National Trust-owned Morden Hall Park. It runs southward, mostly as an urban dual-carriageway primary route, via a roundabout with the A239, then south to a gyratory on the A217 where we also meet the dual carriageway B278.
The northern section is Morden Hall Road, and is part single carriageway, the southern dual carriageway section is St Helier Avenue and is very straight, apart from the section by the roundabout with the A239. The onward road is the B2230, also very straight, suggesting that this is a Roman alignment.
The A297 was not in the original 1922 Road Lists, but appeared when the A217 Sutton Bypass was built. It was allocated to the old road through the town, and then along St Helier Avenue to take over the former B276. The section through Sutton has since been downgraded to the B2230.