Revision before starting medicine after gap year?

Hey

Starting medicine at Manchester in sept

Been on a gap year so havnt studied in a year, still remember a lot of the basics of a levels I did but not much beyond that.

I don't want to be spending my time catching up on knowledge that I have forgotten due to gap year, want to spend most of it socialising and partying.

For this reason, do you think revising biology a level a bit before starting during the summer would be wise or used or is there no need?

Because right now I'm chilling, working a small part time, free most days. Would rather be having lots of fun during the first term of uni.

Cheers