Spitfire
You could go the route that I went to get my exams, as I always seem to be tight on spare time.
I'm not sure if this will be regarded as blatant advertising, I can assure fellow ppruner's thats its not and my only connection to the company is that I took my exams there.
If you look in the back of Pilot or Flyer in the classifieds you will find a small blue and white advert under Groundschool courses for Derek Davidson. If you require his number message me, if you are unable to obtain a copy of either of the above. The exams are taken over a 5 day period in a very intense "learn and sit" fashion.
WORD OF WARNING THOUGH
This is a good way to get your theory exams sorted and out the way.... BUT ..... it is a very condensed crammer course and in order to know the subjects well you WILL need to go over all the subjects again after you have passed to be competent properly in all subjects.
But an ideal way of actually getting the subjects out the way quickly and at a very very reasonable cost. Dont know if he still doing this but as an incentive you may get a flight in controlled airspace on completion of all seven !!!!
Good luck