From next year the theory test questions will no longer be published . There will also be new questions. This may result in more study in the car with your instructor to fully understand the thought process behind what you are expected to be doing.
The reason for this drastic change by the DSA is because too many people just memorise the questions from the book or cd, and do not actually understand what they have read.
By not knowing in advance any of the potential questions, it will require a much more solid and safer thought process to get a pass, and to be safer on the road.
The information on my Theory Test Page will give you the best preperation to sit the exam.