Thomas Alexander McReynolds was the son of T.A. McReynolds, Kingsmills, Stewartstown. Thomas volunteered for service when war was declared having previously served with the North Irish Horse before the war. He enlisted with the Dragoon Guards and was sent to France in 1914 where he was wounded twice. He transferred to the Royal Warwickshire Regiment in the autumn of 1917 during the Third Battle of Ypres and shortly after joining he was reported missing during an advance at Polygon Wood, Belgium.
The Tyne Cot Memorial to the Missing forms the north-eastern boundary of Tyne Cot Cemetery, which is located 9 kilometres north east of Ieper town centre, on the Tynecotstraat, a road leading from the Zonnebeekseweg (N332). The names of those from United Kingdom units are inscribed on Panels arranged by Regiment under their respective Ranks. The names of those from New Zealand units are inscribed on panels within the New Zealand Memorial Apse located at the centre of the Memorial.