Hi OP
Reading through what everyone has written and your replies it doesnt seem that you really enjoy history. People may be saying that it is a respected subject but unless you are certain that you will enjoy the content i wouldnt take it. Check with your teachers and the college on what the course contains. You dont want to be doing a subject you dont enjoy because the dislike will show in your grades. i found that when i did RS, i wasnt really into it and basically i didnt revise because i found it boriing and not my first priority so i only got a B in the AS and then dropped it.
If you want to know anything about a-level maths just ask away. i did the whole A-level in a year so any questions are welcome. As for stats or mechanics, i personally hate mechanics and unless you are pretty good at physics (at least understand physics) then you would probs do better. Saying that, matsh with mechanics works well with physics AS so that could be an option to consider. I personally prefer stats but most of my class think im mad and they like mechanics. If you wanted to take an easy maths there is always decision which is worth exactly the same but is really really easy (so they say, i didnt take it).
As said loads of times before english is good and you dont need law to do a law degree. Some unis ask for a test to be done but i cant remember what its called. Its sort of an entry test on law but as far as im aware it has no relevence to the A-level law and is indepepndent to all your subjects.
To get a better idea of you, would you be able to tell us what subjects you are doig as GCSE and which are you stongest/favourite. that way i might be able to give better advise.
BTW, maths is so much fun!