Lord Rockingham's XI was a group of British session musicians, led by Harry Robinson (1932–1996), who had a No. 1 hit on the UK Singles Chart in 1958 with "Hoots Mon".
The group was put together to play as the resident band on the pop TV programme Oh Boy!, which was produced by Jack Good, and shown nationally on ITV in the UK in 1958/59. They were fronted by Harry Robinson, and also included jazz baritone saxophonist and later writer Benny Green, and organist Cherry Wainer. Other members were Don Storer (drums), Reg Weller (percussion), Red Price (tenor sax), Rex Morris (tenor sax), Cyril Reubens (baritone sax), Ronnie Black (double bass), Bernie Taylor (guitar), Eric Ford (guitar). Joining the group later were Kenny Packwood (guitar) and Ian Frazer (piano).
In addition to backing singers such as Marty Wilde and Cuddly Dudley, they recorded several novelty rock instrumentals for Decca Records, the first being "Fried Onions", which failed to chart in the UK but did slip into the US Billboard charts for a week at No. 96. The second single, Robinson's "Hoots Mon", a rocked-up version of the traditional Scottish song "A Hundred Pipers", featuring mock Scottish cries like "Hoots mon, there's a moose loose aboot this hoose!", rose up the charts supported by weekly TV exposure, and stayed at number one for three weeks. They played "Long John" amongst others.