Chris wrote:
1. Should they be added?
A difficult one which brings to the fore the two (maybe) slightly conflicting aims of the TMA database.
1. To provide a complete database of sites like an official SMR.
2. To provide an easy to use gazetteer that visitors planning a trip can use to get them to the best sites in an unfamilar area.
In Anglesey there are 18 megalithic tombs with something to see, 7 destroyed and 19 possibles (according to this book here). If the destroyed and possibles were included it would satisfy 1 above but not help 2 as it would clutter up the Anglesey page with sites which are probably of no interest to most monument visitors.