Is it too late Watch
Let's assume that I am currently at B grade in all my subjects, not high or low b. If i start my revision now during the easter break, could I get to my target grades of A*?
Don't overdo it though, as you still need to think about your physical and mental health too. Make sure you're drinking fluids, eating regularly, and still getting fresh air. Don't shut yourself in and go into overdrive. Cramming is not all that useful.
Use practical revision strategies and continuous hard work, while also having a bit of you time. Stay sociable (as much as you can, while all your friends are hopefully busy revising too) and stay positive.
Good luck, and keep up the hard work!