An interesting possibility (and a topical one on several levels) is Stanwick in North Yorkshire.

I've had a report from a dowser that the churchyard in the centre has the same "feel" as the Thornborough Henges. This is a circular graveyard with a possible moat. The interesting thing is that Stanwick is on the Catterick-Boroughbridge line.

I'm pretty sure that the church sits on an IA temple of some sort, since it is one and near a few sacred springs and has a relationship with the beck.

I bet there's loads in Ireland.