In the Osprey Aviation Elite book on No 60 Squadron RFC/RAF, there is a photo on page 34 of Keith "Grid" Caldwell. There is a rather long caption under the photo. The last sentence states, "Caldwell died in Jan 1997, at 84 1/2, 30 minutes after cranking his car and joking that it was time he handed in his flying kit." That would have made him only 6 years old at the end of the war - must have been quite a bit of work to modify the controls!

According to
Above the Trenches, Air Commodore Caldwell passed away at 85, but in 1980. No slight to Alex Revell is intended, but I did find the typo amusing. You never know what will slip through the editing process.
Rich