You would need to learn the UK rules for Accounting, very similar to what you already know I would imagine. Plus you would most likely need to get a UK registered Accounting Qualification. Really depends on what your expectations are.
Hi Hassaan, It is pretty difficult getting a job in the UK. U will have to try your luck with friends/relations who are settled in the UK or maybe go on a visit visa and get lucky!
being qualified in pakistan does not necessarily mean that you are Pakistani so the answer from sunil nair is a bit presumptious. Furthermore a visit visa does not allow anyone to work in the UK. Even if you are able to find work, your employer has to apply for a work permit for you (from the home office) and prove that your skills are unavailable in the UK.