In most instances, no. A specialist LLM can help if you want to go into a specialist firm (eg Shipping / Human Rights) but for most commercial firms with broad practice areas, it’s not going to make a direct positive difference.
It can help if:
- you need more time to develop skills and knowledge, and you know you can make the most of your year studying
- you have weaker grades in your undergrad as it presents an opportunity to show academic excellence (assuming you perform well in the LLM)
But your recruiter will not be looking for an LLM, and therefore generally you should only do one for your own interests rather than in the hope it will help you secure a TC.