What am I?

What am I?

Observation - What am I?. Description: On a vine in a hedgerow, forgot to capture image of leaves! Shallow trumpet, but similar to Bindweed. Seen in hedgerow running alongside field currently growing wheat in Gloucestershire. Diameter approx 6cm. Any ideas?????

On a vine in a hedgerow, forgot to capture image of leaves! Shallow trumpet, but similar to Bindweed. Seen in hedgerow running alongside field currently growing wheat in Gloucestershire. Diameter approx 6cm. Any ideas?????