Hi Fitz , Tilley pointed out that Welsh coastal Neolithic settlements were almost exclusively on Meso sites . One great advantage of the coast is you can gather at night , set the alarm for when the tides out and there's a decent moon , bosh time and a half too. The diet change is an odd one ,I think it was prior to to Neolithic up here though. Seemingly salmon skins make a fine mock mohair silver suit , a lot sharper than dull inland browns and reds .