Hiya, there have been lots of warnings for Scotland about giant hogweed springing up everywhere - we have a huge tree down the back of the garden with the characteristic white flowers so I was panicking a bit (neighbour's grandchildren play there regularly). I've had a look online and I don't think the leaves match hogweed, but could anyone tell me what this is and if it's poisonous? It's very tall, maybe about 9 or 10 feet.