hi im year 12 too and i got BED for my winter mocks,and im not sure the winter mocks predictions arent what counts to your final grade,i think its more so the end of year 12 mocks and year 13 mocks and if you do a essay based subjects perhaps a coursework as well
so I'm pretty sure if you put in the work for your year 12 moks and later mocks in the future,you pretty much wont need these winter mooks to be the be all end all solution to your final grade,IDK good luck for both me and you