One of the UK's most valuable medieval books has been put online.

The 800-year-old Sherborne Missal, which is worth £15 million, has been put on the internet.

The manuscript, which sets out the order of service of the Catholic Church, is the first to be put online using a system known as Turning The Pages.

Until now, it has only been available on screens in the British Library, London, and at a few other sites.

Turning the Pages has been developed by the British Library to increase public access to some of its most valuable treasures. Visitors can virtually turn the pages of a manuscript and zoom-in on the high-quality digitised images www.bl.uk