The club 's widest victories in the league have been their 7 â `` 0 wins against Portsmouth in 1964 , against Southampton in 1974 and against West Bromwich Albion in the First Division in 1976 . The club 's widest victory margins in the league have been their 7 â `` 0 wins against Portsmouth in the Second Division in 1964 , against Southampton in the First Division in 1974 and against West Bromwich Albion in the First Division in 1976 .