Can you specialize in a particular field of law during BALLB, or is that only possible after graduation?

I'm afraid you'll only be able to opt for a specialisation at the LLM level. BA LLB is a base course that will provide you with the foundational knowledge required in the Law sector. You can only specialize in a specific area once you complete the BA LLB or LLB and opt for the LLM-level course.