Served with Essex County Constabulary from Feb 5, 1935 and died on Sep 10, 1942.

Police Constable Alexander Henry Barlow Mackay was the son of Alexander and Helen Mackay, of Macduff, Banffshire, Scotland, and was born on 27th February 1914 in Macduff. He joined Essex County Constabulary on 5th February 1935, having previously worked as a seaman with Clark and Servis Ltd. of Bothwell Street in Glasgow.

After completing training at Headquarters Alexander was posted to Chelmsford on 22nd March 1935. He subsequently served at Ongar (mobile duties) from 25th May 1936, Headquarters (mobile) from 14th September 1936, and finally, Romford from 19th July 1937.

Alexander joined the R.A.F. on 15th September 1941 and was killed in a flying accident on Thursday, 10th September 1942 whilst serving as Leading Aircraftsman 1335668 in the Royal Air Force Volunteer Reserve. He was aged 28 and left a widow, Phyllis Mackay.

He was buried at Presbyterian Plot grave 2946. in the Randfontein Cemetery in Gauteng, South Africa.