I suppose to answer your question - where to go next, will depnd on what you plan to do.
There are several qualification routes available but it really depends if you plan self employed or employed, as to which would suit you best. Also what kind of services you want to offer.
If you plan self employment, you could continue down the ICB route but you will need to do level II manual as well soon, before you can get the necessary practice licence and be covered for Money Laundering Regs.
ICB and IAB are similar bookkeeping organisations CAT and AAT are more recognised by employers ACCA is an accounting body
There is more to it than that but, it gives you an idea.