Gerry Armstrong's career will be defined by one goal.

In the same way, Northern Ireland will always remember one tournament.

The 1982 showpiece in Spain was the most memorable of the nation’s three World Cup appearances.

And their squad included one of only three players to date who have gone to the World Cup finals as an Albion player.

Sammy Nelson was coming towards the end of a distinguished career when he joined the Seagulls from Arsenal in 1981 but he was still deemed Northern Ireland’s best left-back and was part of the 1982 squad.

Gerry Armstrong scores his famous winner against Spain

Nelson, whose son-in-law is Sussex and England cricketer Matt Prior, made two appearances at the tournament, as a substitute in the group phase against Spain and starting a 2-2 draw against Austria in the second phase.

Armstrong was a Watford player at the time but joined Albion in 1986 and went on to make 55 appearances for the Seagulls, scoring seven times. He won 63 caps for Northern Ireland, netting 12 goals including three at the 1982 World Cup finals.

The first was in a 1-1 draw with Honduras and the last was in a 4-1 defeat to France in the second phase.

Armstrong scores against Honduras - although the commentator gives it to Martin O'Neill!

The most famous was a 47th-minute winner as hosts Spain were condemned to a shock 1-0 defeat to leave Northern Ireland top of Group 5.

Armstrong later told The Argus: “If I had to pick one moment in football to relive again it would be that. It would be the highpoint of any player’s career to perform in the World Cup finals. But to score the winning goal against the home nation would be a dream. It was for me.”