(Original post by rhododendron)
If you got a 1st, you would be in a good position to apply to Oxbridge,
And even without, depending on other factors (subject, relevant experience, published material etc etc) - first degree classification is probably the major factor, but by no means the only one, for postgraduate admissions and, as much as it may shock and appal some of the people here, some of us do go to Oxbridge for postgraduate work without first-class degrees
[if you tell us your subject, the replies could be more specific
edit: I realise you say with a first, but that's three or four years down the line and while you may think you will get a first now, so do a lot more people than actually get them
. Hence, don't be demoralised if you don't
edit2: my A-levels go on my CV, but just compressed onto one line, with GCSEs on another single line:
(Original post by my CV)
1996-2001: School, Street, City
A-level: Subject 1 (grade), Subject 2 (grade), Subject 3 (grade), Subject 4 (grade).
AS-level: Subject 5 (grade).
GCSE: N, grades X-Y
Certainly a lot of graduate job schemes do filter on A-level points, so I don't see as it does any harm for the university to know it, although you don't have to put them if you don't want to.