A library which holds historic books such as Sir Isaac Newton’s Principia Mathematica will open to the public for the first time – though just for a single day.

Ushaw Historic House, near Durham, will open its 50,000-item collection to the public on 9 August as part of its first ever book festival.

The library at the former Roman Catholic seminary is usually reserved for researchers, Ushaw official Sanjay Gidda said.

Looking forward to welcoming a wider audience, Mr Gidda said: “This is one of the most exciting cultural days Ushaw has ever hosted.”