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...before attempting an ID, please.
Firstly, is this two sides of the same tree? Or two different specimens?
Secondly, I would want photos of the buds, close-up if you can: and photos of any leaf litter below the trunk can sometimes help.
Also an overall shot of the tree can help, as it gives a sense of scale, and sometimes the silhouette is distinctive.
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
The one on the left looks like a very mature Birch. On the right, Sitka Spruce?
Lat/Lng: 56.3792, -3.8368
OS grid ref: NN866222