Case of "Cry havoc and let slip the dogs of war", it could get very interesting at Clywedog.
As to man made nests, the answer is quite a few, Rutland has about 6 I think, without any that are private land around them, 2 Glaslyn, Dyfi, Llyn Clywedog, Padarn, add on a couple that I know about in Lake District, pretty sure the 6 nests at Kielder, Caerlaverock, Leighton Moss, are man made, must be quite a few in Scotland and Borders area.
Another offspring of Mrs G arrived yesterday also, what good genes she is spreading amongst the Osprey community, some of the offspring are with Aran, some her 1st mate
Couldn't resist this super snap of Aran, no wonder the ladies fancy him