The <b>big</b> question there is were they farming the oysters!

Granted, but isn't that a matter of scale? Surely you would need a stable, sustainable and above all - SURPLUS population before non essential ritual structures like temples could be built. By surplus population, I mean sufficient people over and above the economic requirement to sustain the life of the community at subsistence level. That would be true even if the workforce was slave labour. That surplus food production would require the evolution of successful, productive farming before temple construction.

That's it! Avebury was a gigantic slave labour camp. The ditches and huge stones kept them in and they were marched off every morning to work on Silbury Hill. Ditto Durrington - a labour camp for Stonehenge the Cursus and all the extravagant and impractical ritual monuments.

Smiley, smiley, smiley.