Bill,

I have not read this book, but know Giles Milton is an excellent writer and I vividly recall Nathaniel's Nutmeg.
Link:https://www.amazon.com/Nathaniels-Nu...iel%27s+nutmeg

Puzzled the book claims the 1942 raid on St. Nazaire, as this was a commando raid using an old destroyer packed with explosives to demolish the dry dock gate. Wiki says:
The SOE were approached to see if its agents could destroy the dock gates. They decided that the mission was beyond their capabilities because the weight of explosives required would have needed too many agents to carry them.
Link:https://en.wikipedia.org/wiki/St_Nazaire_Raid

SOE rightly can be praised for the innovations it conjured up, but it was not all glorious and their Dutch operation was activity "turned" by the Germans. See:https://en.wikipedia.org/wiki/Englandspiel