I corresponded with Jack back in my pre-internet period. A smashing bloke. A bit of a chancer in his army days though !
His book was probably not aimed at the politically correct and anyone offended by a combination of Arabs, Gypsies, goats and sexual proclivities in a single paragraph probably didn't ought to read it.
I loaned it to my (later-war) ex Royal Sigs Dad and he sniggered quite a lot whilst reading it.
It's really good on anecdotes around things like tool kit inspections. They were put on fizzers for having too many tools as well as too few.
From a 1940 issue of MOTORCYCLING these tyres look the same tread pattern as the ebay GOODYEAR,I wonder did JOHN BULL supply tyres for the war effort,in the MOTORCYLING and THE MOTORCYCLE only FIRESTONE and DUNLOP seemed to advertise their tyers,GOODYEAR is also closing its factory in Stafford Rd Wolverhamton in early 2017 after being there 90 years,they are moving production to Mexico.