Hey, there is a very good Tree Surgery company in London you can contact. They have very reasonable prices and they do a great work. Not sure if I'm allowed to recommend links, but if not the moderators will remove it. http://www.tree-surgery-london.co.uk/ this is their website. And if you'd like to call them directly - this is their phonenumber: 020 3404 3305 . Hope this info is useful to you. :) Cheers!