The chiropractic training courses in the UK are all a minimum of 3-4 years full time. If you want to be a registered chiropractor in the UK you must be regsitered with the GCC and have trained at one of the 3 recognised institutes. See here: GCC: GCC recognised degrees
If its elements of chiropractic education you're looking fot then all three colleges run CPD courses. Visit their websites to see what's on offer.