No they didn't knew what he was up to (the official governments at the time), because otherwise they would have stopped him when he broke the first of the rules he had to abide by (debt of WWI) and he never would have gotten as far as he did (because his military wasn't up for the Job at that time). Only Churchill and a couple of other people who were not in power to prevent it knew he was up to no good. He played the French and the English until he attacked poland.
That is completely untrue.
The British Government knew that massive German rearmament was taking place as much as 4 or 5 years before the war started.