Here's how Europe looked near the end of 1940, Brits look a bit lonely there:
Operation Weserübung was a synchronized operation which included Denmark and Norway in one sweep. Norway fell two months later(june) and was after june, constantly the target of Allied sabotage, using northern UK as a base. They even had "partisan" training camps in Scotland for Norwegian soldiers which had managed to escape. Stockholm was also used as a HQ for Norwegian resistance.
We really don't see much info on the invasion of Denmark, so thanks for posting this, LtBear.