Grahame well thought maybe they did not know she had a key. The front door is actually the back door the one they stormed and battered down. Posh door at front of the house not used according to Maggie Hope you are not confused
Just a thought think the key was in the lock on the inside of the house.
I was watching these cops on tv once and a thief had climbed in through a top window. The police arrived and proceeded to batter the door down without success. The damaged the door so obviously it had to be replaced.
But in the end the copper decided to climb in the same window the burglar did. I thought to myself, "Why didn't he do that in the first place. Now he's done more damage than the thief".