I would like to recommend one college located in Portsmouth (106km from London) where you could take english language cources in UK for as low as 95GBP a week? Only in Spinnaker College!
Their language cources are various:
General english cources - it is just for those who just start learn english
Business English Courses - to learn English for Business Communications
and other cources you can find on their website.

I’m not affiliated with them, simply I’ve been creating their site design, and while working I found out the cost of cources are cheap enoug. Some people who under tight budget might be interested in this college for themselves or their friends.