In the January to March 1881 birth index Percy Edward Allan, Wetherby district, Yorkshire West Riding, volume 9a, page 121.

In the 1881 census 1 Ling Lane, Village of Scarcroft, Yorkshire
Head William Allan, age 32, Groom of gardener (domestic servant), born Rufforth, Yorkshire.
Wife Sarah Allan, age 27, born East Rigton, Yorkshire
Son Walter G. Allan, age 5, born East Rigton
Daughter Mary L. Allan, age 3, born Wighill, Yorkshire.
Son John W? Allan, age 1, born Scarcroft, Yorkshire.
Son Percy E. Allan, age 2 months, born Scarcroft.

In the 1891 census Ivy Lodge, Scarcroft, Yorkshire
Head William Allan, age 42, gardener, employed, born Rufforth, Yorkshire.
Wife Sarah Allan, age 37, born East Rigton, Yorkshire.
Son Walter G. Allan, age 15, born East Rigton.
Daughter Mary L. Allan, 13, born Wighill Park, Yorkshire.
Son John W. Allan, age 11, scholar, born Scarcroft.
Son Percy E. Allan, age 10, scholar, born Scarcroft.
Son Cecil A. Allan, age 5, scholar, born Scarcroft.

UK Royal Navy Registers of Seaman’s Services
Percy Edward Allan
Born January 22, 1881, Scarcroft Yorkshire
Occupation Office Boy
Engagement January 22, 1899 for 12 years
Height 5 feet 3 inches, dark hair, dark eyes, dark complexion
Ships Northampton from December 20, 1897
Calliope April 20, 1898 character very good
Victory III May 22, 1898 to July 20 1898 discharged DSQ

In the 1901 census Tockwith, Wetherby, Yorkshire
Boarder Percy Allan, single, age 19, [no occupation listed], born Scarcroft, Yorkshire
He is boarding with the Brett family