I think you need the particular out-of-date edition that the exam questions were written for
I believe that the exam questions are changed quite often (if nothing else, to keep them relatively secret...), but using a couple of years old chart should not be the end of the world.
The questions tend to be things like:
- distance between 2 aerodromes
- magnetic/true track between 2 aerodromes
- what is located at xx°N yy°W (typically a mast or a disused airfield)
- what is the highest point within 5nm of XYZ aerodrome
- what does the symbol at xx°N yy°W mean and what would you do if you flew close to it (e.g. glider, bird sanctuary etc.)
Some of those things may have changed recently, but most of them probably not.
B.