A special set of stamps has been launched to mark the centenary of the Post Office Rifles' arrival in France during the First World War.

More than 75,000 men from the General Post Office fought in the war, including 12,000 from the PO Rifles regiment.

A commemorative sheet features 10 first class stamps alongside images of the men's service life and information about their campaigns and a reproduction of the regimental recruitment poster from 1915.

Memorials to the Post Office Rifles can be found at Paignton War Memorial, Devon; St Lawrence Parish Church, Abbots Langley, Hertfordshire; and on a plaque outside Uckfield village church in East Sussex. A book of remembrance is placed in the Church of St Botolph, Aldersgate, London.

There is no formal memorial to the Rifles in France, but many of the fallen from the First World War have their names recorded on memorials such as the Menin Gate at Ypres and Sir Edward Lutyens's memorial to the missing at Thiepval.

Royal Mail is also custodian of around 250 war memorials commemorating those who gave their lives and has published a searchable database of memorials to the fallen in its care