Tiffin boys sixth form reference

will Tiffin boys ask for my Y11 mocks/most recent grades later on in the year if they ask my school for a reference? I was told that they will consider your most recent grades to offer a place, and I'm really worried that I won't do as well in my upcoming mocks.
I did quite well in Y10 end of years, and I've already applied with those grades so I'm hoping that my upcoming mocks won't affect my application
Thanks!

Hey, they only look at your end of yr10 grades, so i mean even if u fail ur mocks they wont know