Tree ID by pine needles - Pine leaves are in clusters of 2,3 or 5. Here are photos of seven 2-needle, one 3-needle and three 5-needle pines.
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Scots Pine (Pinus sylvestris) - British Trees - Woodland Trust
Pine Leaves - Tree Guide UK - Tree ID by pine needles
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Simple Keys for Identifying Conifers: The Pine Family – Playful
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Tree Identification