I've just found out that the summit ring of Blencathra has been removed apparently by vandals. Apparently it was taken in late August 2018. Absolutely shocking! Why anyone would remove it is beyond me. The OS have confirmed it was not them:

https://www.grough.co.uk/magazine/20...ulation-circle

There's a fundraising page here. They've already got over £1000 which was their target so hopefully it will be replaced soon:

https://www.justgiving.com/crowdfunding/john-beamson