Air Vice Marshal Sir William Tyrrell, KBE, DSO & Bar, MC (20 November 1885 – 29 April 1968) was a rugby union international who played for Ireland and was part of the British & Irish Lions team that toured South Africa in 1910.

He went on to have a successful career in the British Army and Royal Air Force and became the Honorary surgeon to the King in 1939.

William Tyrrell played his first rugby at a senior level for Queen's University RFC.

[5] He had joined the Royal Army Medical Corps (RAMC) (Special Reserve) in 1912 and served in the First World War from its onset in 1914.

No1 M.A.C., from 1915 to 1916; and Deputy Assistant Director of Medical Services[6] for VIII Corps of the British Expeditionary Force in 1916.

He was seconded as Principal Medical Officer (PMO) to Headquarters Royal Air Force (RAF) with the Army of Occupation from 1918 to 1919.

He gave evidence in his capacity as a medical expert but he also described his own experience of shell shock which he suffered as a consequence of being buried by a shell explosion during his service as a medical officer to the 2nd Battalion Lancashire Fusiliers (12th Brigade, 4th division) on the Western Front.