Born in the Viewpark area of North Lanarkshire, Robertson played for Drumchapel Amateurs and Scotland at youth level before joining Forest in May 1970, making his debut later that year.
Having been on the transfer list before Clough’s arrival in 1975, he became a key player, appearing in 243 consecutive games between December 1976 and December 1980.
Robertson scored the winner from the penalty spot in the 1978 League Cup final replay win over Liverpool.
He then scored the only goal as Nottingham Forest retained the European Cup by beating Hamburg in 1980, having delivered the cross from which Trevor Francis netted the winner the previous season against Malmö.
He was sold to Derby in 1983, a move which soured the relationship between Clough and his former assistant, Peter Taylor.
An early injury hampered Robertson’s progress at the Rams and, despite rejoining Forest in 1985, he never again captured the same form and moved on to non-league Corby Town, Stamford and then Grantham Town.
For Scotland, he scored a winning goal against England in 1981 and netted against New Zealand at the 1982 World Cup.
He earned 28 caps for his country before going on to be assistant manager to former Forest team-mate Martin O’Neill with Wycombe Wanderers, Norwich City, Leicester City, Celtic and Aston Villa.
In 2015, Robertson topped a poll by the Nottingham Post newspaper of fans’ all-time favourite Forest players.
Shortly after his death, Forest owner Evangelos Marinakis said the club would name a stand at the City Ground after Robertson as a “lasting recognition of his extraordinary contribution to our club”.
