It covers more than 50 square kilometres of blanket bog, heath, meadows and woodland and rises from a valley floor to the 640m summit of Cold Fell in the north Pennines. This is RSPB Geltsdale, and it will now be the organisation’s largest English bird sanctuary when the society announces this week that it has bought land that expands the existing reserve by a third.

“This is going to be a reserve on a different scale from many of our other sites in England,” said Beccy Speight, the RSPB’s chief executive.

“We are going to achieve an abundance of species and a size that will be unmatched for bird reserves elsewhere. It is going to demonstrate what is possible when it comes to rewilding and protecting birds.”