Stem unwinged, leaves stalked, white flowers. Doesn't seem to match any of the Comfrey species in Rose.
No interactions present.
Wasn't sure if the calyx teeth were right for White Comfrey, they seem long like Common Comfrey, but the image is a little blurred.
Lat/Lng: 51.4071, -2.3785
OS grid ref: ST737676