This is Western Gorse, Ulex gallii, growing by the Pembrokeshire Coastal Path alongside bell heather and some Ulex europaeus which is no longer in flower. Telling it apart from its big cousin can be tricky, but their flowering times differ and general growth habit, which helps when they are found in proximity. Also Western Gorse doesn't smell of coconut and has tiny bracteoles. The spines are only faintly furrowed and less robust than those of Gorse.
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