Plant Id please

Plant Id please

Observation - Plant Id please. Description: Can some one please ID this for me. I was on the east coast on holiday and photographed this in Whitby it was on top of a small cliff above the town, it was very dense.

Can some one please ID this for me. I was on the east coast on holiday and photographed this in Whitby it was on top of a small cliff above the town, it was very dense.