[4] He was also part of the Rangers team that got to the final of the European Cup Winners' Cup in 1966–67 and was part of the campaign that eventually brought the trophy to Ibrox in the 1971–72 season; however, he was not involved in the 3–2 final victory over FC Dinamo Moscow in Barcelona in May 1972 as he had left Rangers just prior, having fallen out with manager Willie Waddell.
[4] Henderson signed for Sheffield Wednesday for the 1972–73 season and made his debut on 12 August 1972 in a 3–0 victory over Fulham.
Henderson left Wednesday at the end of that season and went to play for Hong Kong Rangers.
Henderson remains one of the youngest players to represent Scotland at 18 years and 269 days, and won more caps than his main rival for the position at right wing, the highly regarded Jimmy Johnstone of Celtic.
[8] Whilst playing for Rangers, Henderson owned and ran a hairdresser's shop in Glasgow.
He later operated a hotel in Lanarkshire and worked for Rangers at Ibrox on match days as a hospitality host.