Revision Courses

Hey, For L1 I went on a revision course before the exam and found it quite usefull. I live in London and have been looking at the courses again and for some reason they have doubled in price. I’m sure I paid circa £350 for the course which is now looking at £700 (5 day revision course). I have looked at Kaplan and Quartic (which are £700 and £800 respectively) however was wondering if anyone knows of any OTHER companies that offer ONLY revision courses??? 7city seems to offer an all round course and so does stalla but I can’t find anywhere else that offers only revision courses. Cheers