Extra curricular activities vs good academic grades

Are high grades and a good education no longer enough to land a decent training contract? And will my lack of extra curricular activities ruin my chances of succeeding in law?

I’m a non-law student at a top 5 university. I have good grades and chosen good academic subjects throughout my education. I have concentrated on my education – and now the problem is my lack of extra curricular activities/experience. Now that I am in my second year I find it a struggle to find the time to take part in lots of activities – and I don’t know how I am going to show to potential employers that I have the necessary skills to become a lawyer. I am hoping to get some sort of voluntary experience in the holidays – but will this be enough? Will my lack of extra curricular’s jeopardise my chances of landing a training contract or will my academics make up for it?