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A picture showing the buds would help to ID this
Sorry, again the quality of the picture isn't very good!
...it's not easy to get clear pics of buds - I always struggle, with just my little phone camera.
If I can, I take home a small twig so I can use my "decent" camera indoors.
Again, sharply pointed buds, and a terminal cluster of buds, I think it's Bird Cherry.
Jenny, if you want to check this suggestion, you could go back to the tree and scrape off a little of the bark from a twig, then smell it: if it's Bird Cherry, there will be a very distinctive sharp, fairly unpleasant smell.
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
Perfect, thank you for the advice!
Lat/Lng: 57.1, -2.2
OS grid ref: NJ8809