Found in hedgerow, next to Magnolia tree, in an occasionally-managed area on industrial estate. Probably planted many years ago as part of site improvement.
No interactions present.
Thank you for the revised ID and agreements; hadn't thought of this as a possibility originally, but I agree too.
Lat/Lng: 51.5738, -2.9471
OS grid ref: ST344865
Areas of waste ground between industrial units on the outskirts of Newport, south Wales