He scored Watford 's only goal in 1985 FA Youth Cup final .
Allen was born in Deiniolen , Gwynedd , but began his career with Watford , signing apprentice terms in July 1983 , before becoming professional in March 1985 .
Allen scored Watford 's only goal in 1985 FA Youth Cup final .
Allen was born in Deiniolen , Gwynedd , but began his career with Watford , signing apprentice terms in July 1983 , before becoming professional in March 1985 .