Percy was born in Wolverhampton in 1894, and was baptised at St Mark’s Church, Wolverhampton, on 26 April 1894. He was the son of Samuel and Jane Coss, living at 53 Merridale Street at the time of his birth. They were at 93 Oak Street in 1901, living with Percy’s brothers Harry, Horace and Harold. By 1911 the family were at 239 Merridale Street West, together with brothers Horace and Albert, and sister Doris. Percy was a bottler in the mineral water industry.
On 30 October 1914, Percy’s name was listed in the Express & Star as one of the men who had indicated their willingness to fight. He was also listed in the Midland Counties Express on 5 September 1914 in a similar list. His address at this point was still 239 Merridale Street West. However, I have not been able to confirm details of his military service.
Percy survived the war, and married Minnie E. Weaver in Wolverhampton in 1922. The couple do not appear to have had any children. Percy died in Wolverhampton in 1950.