A neurologist is a doctor working in a specialist area (even if he/she then goes into research). You can't become a neurologist without becoming a doctor first.
A neuroscientist studies the nervous system and the way that it inter-relates with other areas of scientific and medical research, including (for example) psychology.
You need to decide which path you want to follow.
Neuroscience is offered (under that name) by the following universities:
Bristol, Central Lancashire, Glasgow, Kings College (London), Leeds, Manchester, Nottingham,St Andrews, Sussex and University College (London)
At Cardiff the relevant course title is Biomedical Sciences (Neuroscience). At Cambridge it's Natural Sciences (Neuroscience). Edinburgh offers Biological Sciences (Neuroscience):
http://www.ucas.com/s...esearch/2012searcheu/
(Check the course requirements for each university. However Biology, Chemistry and Maths provides a sound foundation for many areas of scientific study).
Just a thought though:
Don't even consider taking A-level Maths unless you're REALLY good at the subject. It's far, far harder than GCSE, with even the most able students usually struggling for at least some of the time. (I write from experience: I used to teach A-level Maths!).
Chris