Post A level results options questions

I think they'll be a bit higher, but worst case, I think my A level grades are going to be A*AAA in Maths, Further Maths, Chemistry and Computing respectively and then A in EPQ. This meets my firm choice A level requirements but I'll have to see whether I've met my STEP requirement and the STEP wasn't nice this year so not too sure what's gonna happen there.
If I am going to reapply, I've seen a lot of minimum entry requirements being 2 A* A at the top unis. Would I not be able to apply to these places because if I achieve my worst case, I've not met these grades? Would they even bother looking into my application at this point?
What do the top unis think about resits? I'm aware that Oxbridge will be out of the question, and perhaps Imperial, but what about other places? I'm a non-contextual applicant btw.
Generally speaking, what top unis have places in Clearing for Computer Science every year, if not most, and have been cropping up a decent amount in the past few years with these "worst case" grades?
I'm super stressed out right now, so I'm hoping and praying that I've achieved higher.

Years ago my son was in college and a girl applied to Cambridge to study Maths. She was made an offer to get A*AA and the top level in STEP.. She actually achieved A*A*A*A* in Maths, Further Maths and I believe the others were Physics and Chemistry. She missed the grade in STEP and got rejected. This is what you are faced with.
Currently Computer Science is a very hot subject and Imperial makes offers to 1 in 20 of those applying. They expect everyone to meet their offer and will have enough applicants who do not to need somebody who doesnt. It is highly likely you will get rejected.
Generally top universities will not be offering CS in clearing. Some lower graded RG and places lie Lancaster might but the top universities wont. Your best option will be to check ucas course search and filter on show universities with vacancies. If a university doesnt have vacancies now it isnt gong to in clearing. They are confident they will fill their spaces either with students who meet their offers or maybe for near misses.
This is the reason why we advise students to have sensible insurance choices.

Years ago my son was in college and a girl applied to Cambridge to study Maths. She was made an offer to get A*AA and the top level in STEP.. She actually achieved A*A*A*A* in Maths, Further Maths and I believe the others were Physics and Chemistry. She missed the grade in STEP and got rejected. This is what you are faced with.
Currently Computer Science is a very hot subject and Imperial makes offers to 1 in 20 of those applying. They expect everyone to meet their offer and will have enough applicants who do not to need somebody who doesnt. It is highly likely you will get rejected.
Generally top universities will not be offering CS in clearing. Some lower graded RG and places lie Lancaster might but the top universities wont. Your best option will be to check ucas course search and filter on show universities with vacancies. If a university doesnt have vacancies now it isnt gong to in clearing. They are confident they will fill their spaces either with students who meet their offers or maybe for near misses.
This is the reason why we advise students to have sensible insurance choices.

You would need to ask each university directly about whether they would consider you with achieved grades below their standard offer or whether they would expect you to resit.

Would these responses be legitimate? Because I thought about doing this but it hit me that they might just say yes and then just reject me straight up because of my grades being lower than their minimum entry and I'll just have wasted a space on my UCAS form.
Additionally, if I go for universities where I haven't quite met their minimum entry, but they have an admissions test, which if I were to hypothetically do really really well on, would they then consider my application and would that put me in with a good chance of getting an offer? Looking at Warwick CS here along with other places.

Somewhere as competitive as Warwick is really hit or miss. You might be better speaking to them but those universities wont end up in clearing. If you want to use clearing the really universities Warwick, Durham, Edinburgh, Bristol, Bath are not going to be in clearing for CS which is mega competitive in top universities. This is why we constantly advise people to apply at least one sensible choice.

Would these responses be legitimate? Because I thought about doing this but it hit me that they might just say yes and then just reject me straight up because of my grades being lower than their minimum entry and I'll just have wasted a space on my UCAS form.

Additionally, if I go for universities where I haven't quite met their minimum entry, but they have an admissions test, which if I were to hypothetically do really really well on, would they then consider my application and would that put me in with a good chance of getting an offer? Looking at Warwick CS here along with other places.

Admissions staff won’t encourage you to apply if there is no chance.
We have better things to do than to make extra work for ourselves.
Have you looked at Southampton - arguably better than all the universities you’ve mentioned for CS but less popular so usually more interested in spotting potential than the fashionable universities.