Hi waltraud, thanks for your sighting. The media from your sighting does not display all the necessary features required for verification. To help us verify this sighting, please provide additional media showing key characteristics, including: close ups of leaves, front and back, any buds, flowers or fruits, stem characters....
abread111 see new close up; I began to tackle yesterday along with privets and mapped with Field Maps; each shrub with multiple stems - not sure whether this is natural growth habit or result of regular slashing....
Having seen it in the flesh, I think it is a Prunus. Leaves have serrated edges which I cannot see in your photos, the leaves are quite thin, not fleshy, and there are occasional spines. Don't think it matters which Prunus. If you think it does, will have to leave one somewhere to flower and fruit. Hard to do when they are in the slashed zone. We have previously recorded P. cerasifera in this area.