I did my IMC in California and so purchased the West coast Jeppeson airway/approach charts (about 20 quid).
This included lots of sections on chart details and other interesting things. I think it may be a bit more expensive for the UK version.
I am doing the Oxford ATPL groundschool which uses Jeppeson notes and includes a training set of Jeppeson charts i.e. airways/approach plates.
You can probably buy it separately from some pilot supply shops.