Well, these are strange days, and no mistake! Awful days too, for many.
I've spotted loads of really interesting resources being shared on various media over the last few days. So many that it's all a bit bewildering, and I'm sure a number of have passed me by. I might try over the next few days to compile some sort of list - but if anybody has already done that, please let me know, and I'll share it here.
One that I haven't seen mentioned is Isaac Physics. I have used it a lot this year, and even before this shutdown, I thought it was great. Initially you have to get used to the fact that it's a huge site, and it takes a little navigation. But once you get used to it, its easy to use. I initially found a bit of student resistance too, but that has been lessening over time - and presumably we're now in a whole new world from that perspective.
There's a file here, laying out the steps to getting started
And a file here, showing some exercises from the optics section that link to the L Cert, rather than A levels.
and an introductory video here...