One update. I got a phone call quite late last evening from a police officer in Blaenau.
He took details of the item that was removed from Wrysgan I also described how the Maen Offeren wagon was moved, cut up, and parts stolen over a couple of nights.
On the Wrysgan item we had quite a protracted conversation that never really got that far. Basically, to cut it short, he asked, was I the owner? How do I know it has been stolen? Could the owner not have moved it somewhere himself, or legitimatly sold it? I had already explained it's difficult access position, and that someone had been up a couple of days ago to check it hadn't been thrown down the mountain somewhere.
Eventually (he must have finally realised I wasn't going to be brushed off quite that easily), he agreed they would try and identify the owner and contact him. The officer then said "If we don't find him we may not tell you, or if we do find him and it has not been stolen, we cannot tell you due to the Data Protection Act". He did agree to contact me and tell me if any progress was made. I will not be holding my breath!! I did suggest he gave the owner my name and number so he could contact me if he wanted to.
On my suggestion that it might be the same group who stole the wagon from Maen Offeren due to the planning and man power required for both jobs, he more or less said you might think you are right but you might not be!
Overall I was not impressed, not that I really expected to be!