Veritas Gmat 480 (q33,v24) blind test and no study- 700+ realistic?

Hi, I am in my 2nd year of uni in the UK and am considering applying for a deferred entry to HBS/GSB/Wharton/LBS when I get to my last year of study (2021/22). I have a year abroad coming up and am weak at tests so thought I could benefit with using the year to practice GMAT as I am s**t at standard...