During the summer of 1917, a young man called Fred sent a postcard to a Mrs Nottage of Campbell Road, East Ham, to tell her of the weather he was experiencing in France and of his hopes that she was in good heath.
On July 1 1916, thousands of soldiers walked across to German lines on the Western Front and began their assaults, confident their enemy had been weakened by a week-long bombardment of 1.6 million shells.
In the centenary year since the outbreak of the First World War, many organisations have staged events to mark the contribution, and in some cases the sacrifices, made by many who fought in the conflict.
For the thousands of supporters who flock to Upton Park every other Saturday, life without West Ham United would be unthinkable. But fans and players a century earlier nearly had to face just that when war broke out in Europe.
Up at The O2 has teamed up with London24 to give one lucky reader the chance to experience urban mountaineering this summer with an exhilarating 90-minute climb across the roof of one of London’s most iconic landmarks.