In 2015, a pair of Peregrines attempted to breed on York Minster. There had been birds present since the previous year and they were monitored by several people, most notably at the time by Jack Ashton-Booth, who set up the Twitter feed to share information about them. More recently this has been run by Doug Crawford who puts in many hours observing the birds almost daily.
That year, they did show signs that they had built a nest and could have laid but the attempt failed. A nesting platform was put up in 2016 which hopefully would give them a better chance than laying on the accumulated sludge of centuries of pigeon droppings.
Peregrines have been present on the Minster ever since, it is thought that the male has been the same bird throughout but there have been different females at the site. There has not been a successful nest as yet, perhaps 2017 will see them succeed.