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Yes, I agree that it's most likely to be Beech.
The leaf edges are untoothed (Hornbeam is very similar, but have toothed leaves with very distinct veins) and wavy.
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
Lat/Lng: 51.5155, -0.0283
OS grid ref: TQ369814