All guys what I want to advise you is that even in UK, there is many Chinese environment available to you, which I think it is very important for you to improve your Chinese. I am a Chinese who visit Imperial College London for one years, and I know some Chinese students like rent a house and share the different bedrooms. They speak Chinese in apartment, but English instead outside the house. If you guys contact them and live with them, I believe you will have many chances to speak Chinese during your daily lives.
At last, I want to warn again that language environment is the only shortcut to learn a foreign language, especially for Chinese.
Good luck all you guys.