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looks like Prunus lusitanica with red stems and darker green leaves which might be part of the same hedge.
That's an interesting observation Graeme. I took that picture farther along the hedge than the other photo's. It could well be a mix of species in the hedge. I will take a closer look next time I'm up there - possibly tomorrow.
Lat/Lng: 55.60624, -2.45535
OS grid ref: NT714348