Hi, I am an LLB graduate who got a 54%. I am considering applying for an LLM. any advise on where i would havegood chances of getting accepted?

Admission depends on a lot of factors. Did you get the 54% at a British university? Do you have other selling points? (qualified lawyer, work exp?). With a 2.2 you should definitely get accepted in some uni's but forget about the top places.

On another point, and this may not apply to you, don't use an LLM to bolster a poor LLB result - recruiters see right through this move.