I have Fendick's "A Canloan Officer" and it is an excellent book. I found a signed copy on Abebooks about a year ago.
I also have Kerr's "The Cherry Beret..." (another signed copy, also found on Abebooks) but he was not part of the Canloan operation (despite the title of his book), though he was loaned to the British army, with other medical officers. His name is not on the official Canloan list and Fendick in his book is quite adamant that only officers of the Canloan operation are true Canloan officers. Kerr's book is interesting.
It appears the British army needed medical officers and the Canadian army sent some in 1941 (almost 3 years before the Canloan operation). There are 43 names at the end of his book. The list comes from "Q" List Officers, Rec/34/Q LIST/1 dated 22 December, 41, Directorate of History, National Defence Headquarters. So in effect, it seems there was at least two times when Canadian officers were loaned to the British army.
I hope this helps.