How to choose a realistic Insurance?

I think those are fine. If you are predicted A*AA and the prediction isn't too optimistic it should be fine to have AAB as insurance. If you really want to go safe pick one ABB and one AAB

firm - A*AA
insurance - AAA

the chances are that if you get AAB then your insurance will still accept you anyways

for example i go to nottingham and i know someone who got a B in further maths A-level and were still accepted....just make sure you get an A in maths
someone else I know had an offer from liverpool for ABB and got ABD and still got in...

Thanks for info. How is Nottingham? I'm applying there and really enjoyed it on the open day.

coming to nottingham is honestly been the best decision I've ever made; i;ve been here 2 weeks and I've had so much fun. freshers week was really well organised meaning i went out 6 nights in a row and all my lecturers have been really enthusiastic and helpful and the maths department itself in terms of facilities is really impressive and better than most unis... besides the course nottingham just opened up their new £40 million sports centre which is like 2 mins from my hall and so if you're into sports its probably the best uni to go to now when it comes to access to amazing facilities and the campus is 300 acres and very green and has a lake i mean what more could you ask for lol

I haven't applied to any that are ABB, because you could always just apply to those kinds of universities in clearing if you really had to. Better to use your choices on universities you actually want to go to.

I chose an ABB course as my insurance for my UCAS application and I'm predicted A*A*A, but that's because my course is quite niche ☺️. I would definitely put an AAB as insurance if you have modular subjects because then you're halfway there already, as someone above said also- most ABB courses will be in clearing if it comes to it, I'm just overly cautious and put one on mine straight away. Best of luck for your application!