Not Royal Highland Fusiliers is he? The regiment David Niven would not join at any price
No not Royal Highland Fusiliers, which did not form until 1959, when the Royal Scots Fusiliers and the Highland Light Infantry, in which David Niven was commissioned, were amalgamated. So no wonder he couldn't join it at any price!
However, Wanders was nearly there since I suggest that our bespectacled Captain was in fact a Royal Scots Fusilier.
Jack (aka Jock)
PS One day, if I can get round to it, I might enlarge on the difficulties that apparently arose between the amalgamation of a predominantly Protestant Lowland regiment and a predominantly Catholic Highland regiment, and how they were cleverly resolved.