There was actually a moderate amount of worked obsidian produced in the British isles during the neolithic. The only major source I'm aware of for it was Arran.

There was actually a moderate amount of worked obsidian produced in the British isles during the neolithic. The only major source I'm aware of for it was Arran. So-called Arran pitchstone is pretty ugly though. Not relevant to the objections, just a fun fact.