Ex-plant

Got back from a week in London tonight, to find that one of my plants has died a death. I would identify the type of plant this is but due to a cheeky (illegal) stunt pulled by my uncle whilst travelling abroad a few years ago, that would not be wise to disclose on an open blog. I found it strange that only one out of the 6 treelets died though, luckily it was the wonky one. I suspect foul play from one of the straighter, prettier illegal trees...