|War memorial Paddington station
The statue shown here is from London Paddington Station. It was built to commemorate members of the 100 members of Great Western Railway Company staff who perished in the First World War.
The Letter To An Unknown Soldier website will remain open for 37 days, from 28 June when Franz Ferdinand was assassinated, triggering WW1, to 4 August when Britain announced it was at war.
People can post letters on the Letter to an Unknown Soldier website or send letters to the statue at an address at Paddington station.