numerical tests

efinancialcareer have a few online test samples. But really there is no point to practice for numerical, its GCSE standard.

Wrong, I know people with math degrees from top schools who ****ed up because they thought like that. The questions are not hard, but what is hard is getting used to doing them in under a minute each, and getting used to the style of questions. So practice is vital for success.

Not at all. I took my first test ever with BNP Paribas. Pretty straightforward, and I've got a telephone interview. The same with the other firms I've applied to (I assume so, because other friends immediatley recieved rejections following their sittings).

Advice - relax. Seriously, just relax; do what intuitively feels correct, and you should be fine.

Also, I'd like to raise a totally unrelated issue: don't assume that A-levels are the be all and end all - they're just screening (according to my friends dad - KPMG HR). So for all those flustered by getting ABB - it really doesn't matter.

Yes but you ignore the fact that that is accountancy and this is banking. For accountancy they have huge quotas (approx 1000 I think for big4). They also openly state they want 300 ucas minimum.
If you consider the fact that the cream of the crop will typically want to go into banking, then it is quite clear the people that apply to accountancy will be 1)banking rejects, 2)people who didn't bother applying for banking because of the competition or 3)people who genuinely wanted accountancy over banking.
Now based on personal experience I can say the majority will fall into category 1/2 and so will generally have lower academics or poor social skills. Hence why accountancy firms will be less stringent.
About the math tests, you are an exception if you did your first ever numerical reasoning test without any practice at all, I guarantee you that the majority of people will need to do some kind of practice to familiarize themselves with the questions and style of testing or they will completely **** up.