Have you considered any electronics? Learning to code can demonstrate rigorous thinking as well as being able to focus and self teach.
It also shows a practical side that you may otherwise miss out on in your regular a levels, as well as talking points for your personal statement or interviews if you have to do them.
I’m doing an electronics project (never studied ict or anything for gcse) and it’s going pretty well.
I’m year 13 and applied for maths, and I think engineering/physics is the same in that they have some computing modules in the first year? So it will definitely look good in terms of that!
But mostly, make sure it’s something you’re interested in. Some lads in my year are doing essays for their project and hate it cause they’re not ‘essay people’ and are mostly doing it for the grade - don’t.
It’s so much easier to put a lot of work in it if you’re genuinely interested, so make sure you’re choosing a topic area you’re interested in.