https://www.medschool.it/ is a good starting point
Milan seems to be quite good.
"As far as entry requirements: you need this thing called a DV (declarazione di Valore - certificate of equivalency).
4 step process: You take your GCSE and A-level certificates and take them to a local solicitor asking for "certified copies". This does not take long - maybe 2 hours at max.
Take these Certified copies and send them off to somewhere in Milton Keynes to get them "Apostilled". This takes about 2 weeks, if you're lucky.
With your apostilled certified copies, together with your original certificates (God knows why) and many passport photos (you will need loads of these later - make em pretty ones) you take them down to the Italian consulate in London (136 Buckingham Palace Road), to get the Apostille Stamped and the DV. This final step should "take you about 30 days"...
Requirements for the DV (for Brits) is to show that you have been in full time education for 13 years. I cannot remember seeing anywhere that minimum grades were required - but I assume the entrance test accommodates for this.
Somewhere along the line, you need your certificates translated into Italian to bring with you to registration in Italy.
General theme throughout: Start early as hiccups are bound to happen, and make many passport photos and photocopies and bring these with you to Italy for registration." - copied from
https://www.thestudentroom.co.uk/showthread.php?t=1988517