I'll be accused of my usual advertising here, but as we at the MegP already welcome fields that once had stones in them, and all the obscurest humps of the Midlands (right P&V :-) we will be welcoming ancient churches with unusual features such as Pagan leanings too.
Not merely a kneejerk - we have a number of other related new categories in the pipeline too. Anyone else wishing to contribute grid refs and details of ancient stuff that you're not interested in on this site please get in touch. Now that's not competition is it?
Go on, flame me then [ducks]
Andy