Michael Dames (bless his little cotton socks) pointed out the similarity between the Uffington WH and the 'Mare And Foal' souterrains at Uisneach (home of the Fire Druids, centre of Ireland and big Beltaine site).
The two souterrains were said to be the Dagdas stables and when the two bits are put together they do resemble the UWH remarkably.