I don't think it's UCAS points. I'm not sure what it actually is though.
It's used to calculate your average GCSE points score; it has nothing to do with UCAS. A* is 58, A is 52, B is 46, C is 40, D is 34, E is 28. It's used by sixth forms and colleges to determine how many, and which, subjects people can take at A-level. You average out the numbers according to your grades; some places will stipulate you have to have a certain APS (average point score) to be able to study there, or ask for a certain APS to be able to study 4 A-levels as opposed to 3.
UCAS is the system you have to use to apply to university.
When it comes to applying for university, you use http://www.ucas.com/ in order to do so. They deal with everything to do with university and even when you find out whether you got into your first choice uni on A Level results day, you can check the website at around 8 am before going into school.
(Experience from my brother who's going to uni in 2 weeks).