Siegfried Sassoon’s First World War diaries – some bearing traces of mud from the Somme – are among 4,100 pages from his personal archive being made freely available online from today, almost 100 years since Britain declared war on Germany.

A digital archive of 500-year-old 'filofaxes' offers extraordinary insight into early thought and writing practices.

Are you keen to make your research more widely visible or store and preserve your digital material?