Helicopter flying...

Because we don't live very far from Heathrow and Sandhurst, at least as the crows flie, we often hear and see planes and helicopters flying by. We don't always see them very well, but sometimes they are at low altitude. Like this helicopter, which I saw yesterday. I think it was a military one, not a civilian. It sure looks like an army vehicle. Therefore, it came from or went to Sandhurst. That's the best shot I could take. If you know about them, tell me what type of helicopter it is. I'm curious.I never get bored with helicopters, not sure why but I love them.