A war diary kept by Field Marshal Douglas Haig during the First World War has been included in an online register of globally important documents.

The Army commander's diary is a record of pivotal battles including the Somme and Passchendaele.

Held by the National Library of Scotland, the handwritten journal has been added to the UK Memory of the World Register, run by Unesco.

Darryl Mead, acting national librarian, said: "It is a great honour to have the library's collections recognised once again by Unesco for inclusion in the register.

"Our inclusions now range from the 16th to the 20th centuries demonstrating the breadth and world-class quality of the material held here in Scotland.

"Important parts of the collection, including short excerpts from the Haig diary, are now available free to anyone with an internet connection from our website."

Fld Mrshl Haig, who was born in Edinburgh, joins pioneering printers Walter Chepman and Androw Myllar, and publisher John Murray, already included in the register.

Three items from Scotland are included in the 11 new additions from British libraries, archives and museums.

The remaining Scottish entrants are the Aberdeen Burgh Registers and the Scottish Royal National Institution archives, held at Stirling University.

The institution provided custodial care for mentally impaired children in Scotland in the 19th and 20th centuries.