I get asked every few months for suggestions on where to study Arabic in or near the Waltham Forest area and I have to dig around to remind myself of the options. So I thought I'd up a list of options that I'm aware of and I'll add to this list as I become aware of more options...
Arabic Courses - Leyton
Al-Shateri: Al Ehsan Institute - Leytonstone
Ebrahim College - Whitechapel
Tayyibun Institute - Whitechapel
As well as the above in-person courses, another option is self-study. If you have the discipline and persistence to put in the hours required working alone here's a couple of options:
Bayinnah TV - well worth the £7 per month or whatever it is for access to the Arabic, Qur'an and other courses available.
Mastering Arabic book series by Palgrave Macmillan publishing - buy all the different books in the series and get cracking!