Much of what I've read about Monty is he did not trust the intel coming down from ULTRA/Bletchley Park. In the North Africa campaign Monty would be told that Rommel would be at a specific location and he would not act on it fearing the intel was bad. This happened many times I've read and it would totally frustrate Churchill.
I've read that if Monty had acted and attacked Rommel would have been destroyed and the whole European theater would have been won at least a year earlier.
The Brits would still not be on the continent