Will Universities still accept me if I am 1 UCAS point below?

My current predicted grades are AAB and I have 7 ucas points from a course I took over the summer. I would like to apply to a few Russell group universities that have AAA which is 144 and I have 143, will this make them less likely to reject me or make no difference?

I’m planning on doing Cyber Security, the course that I took was the CyberFirst advances course which is certified by GCHQ (the same people that certified the AAA degree at Warwick that I want to apply for)

That's interesting. According to the link below, cyberfirst courses don't get UCAS points...

https://www.smallpeicetrust.org.uk/cyberfirst-faq#:~:text=Do%20these%20events%20offer%20UCAS,in%20the%20list%20of%20courses.

My current predicted grades are AAB and I have 7 ucas points from a course I took over the summer. I would like to apply to a few Russell group universities that have AAA which is 144 and I have 143, will this make them less likely to reject me or make no difference?

The key points to take away here from the above excellent remarks:

a) Not all universities use the UCAS Tariff, and many offering courses of AAA or similar grade requirements in fact do not

b) It's perfectly reasonable to have a couple of "aspirational" choices a grade above your predicted grades usually if you're sensible about that they are

c) Not all courses with a UCAS Tariff point value will be accepted by all universities, you need to check individual university requirements

An additional point not noted above worth considering is what subject your B grade is in, as that can make more of a difference for "aspirational" choices. If you're predicted a B in an unrelated subject they may be happy to make you the standard offer and see if you can stretch to achieve that. However if you're predicted a B in a required or very relevant subject, that may instead make them question if you will be able to succeed on the programme.