~50 m into sand dune
No interactions present.
I would agree with martinjohnbishop that this is probably a hybrid. Pure Burnet Rose would have black hips. It is hard to see if the leaves are downy, but as R tomentosa is rare in Denbighs, it is more likely a hybrid with sherardii or mollis or even canina. In any case, it would be a very rare record and worth getting the VC recorder involved in identifying it.
I made a bad choice for the other likely parent.
From known distributions the most likely is Rosa sherardii as cicuta58 has stated.
It would be new from that 10 km square in anyway.
Lat/Lng: 53.3332, -3.4443
OS grid ref: SJ039827