Good luck Ianj, fingers crossed for you.
No, Virgin no longer require you complete a maths test. A part of the group tasks is you are all given a card with about eight lines of information about the compny on it, which you must read aloud to the group, I guess to see how confident you are speaking to strangers??? You can actually read??? I don't know but I'd recomend you practise reading aloud if you're not confident.
If you're successful through the mornning and invited to attend the 3:1 interview in the afteroon, you will be given a an A4 sheet with information on it, which they will give you 2 minutes to learn, and then present you with a bunch of multiple choice questions. If you don't pass this, they will send you home again.
I attended the assessment just the other week so if there's anything else you want to know please ask and I'll do my best!