That is genuinely very interesting Fourwinds.

Because my focus is just on that area of Wales, I just took it for granted that Ireland was heaving with court tombs.

The main arguing as far as I can decern is whether or not the Breconshire ones are derivative of those in the Cotswolds or vice versa.

I'll check my exceedingly dull archaeology reports and check out the dates on those thus excavated. but I'm getting a dim memory of 4,400BC for Gwernvale, Crickhowell.