As someone who’s finished Y11, i did not do much work over y10 summer (mainly due to moving house and city, and a few holidays).
In Y11 I regretted this a little, but mainly due to not doing core subjects such as maths and science (these are forgotten very easily by anyone). So I’d recommend doing an hour of maths a day from now on, this could be either getting to familiarise yourself with y11 maths work or just practising things you learnt in y10.
I’d say if you have notes on English language and lit you will remember the quotes fine if you look back at these before coming back to school (your grades are amazing so I’m sure you’re great).
Maybe look on your school website or something and see if they have curriculum maps for Y11. It’s worth familiarising yourself with these just to see what will be taught (e.g reading an English set text a few weeks before it was taught I found helpful, or watching a history documentary)
Anyways your grades are amazing, so don’t stress too much