Lord Glendyne
Robert Nivison, Bt, 3rd Baron Glendyne, senior partner in R Nivison & Co - stockbrokers.
G-BGIM may have replaced a Jetranger but I am not sure. It kept the standard AS cs for a long time but later was resprayed in a gold colour scheme.
From new G-BGIM was operated by McAlpine Helicopters, but it may have moved on to Lynton Aviation before it was sold to Tom Walkinshaw as G-OKAT in 1988.
Interesting registration G-OKAT could it be a reference to Jaguar for whom TWR ran their Le Mans team, and a pun on the cat food brand? Or perhaps a ref to a lady by the name of Kate? Who knows?