Getting A Levels and then going to University isn't the only way of getting qualifications. You can progress by instalments mixing in work experience. There is a new system being set up called Qualification and Credit Framework, to make this process easier and more transparent, but basically all qualifications have a credit value and can be used as a substitutes for parts of the next qualification by "accrediation for higher learning". It is a useful way of improving career prospects while getting workplace experience at a manageable pace. It might take twice as long, but getting a degree can still mean having the same problems finding work and fitting in in the workplace, so a slower progression may be beneficial.
The best way to see this is to go to the DirectGov website (www.direct.gov.uk) and select "Education and Learning" then "Qualifications Explained". This sets out the qualification levels and further down the page is a clickable list of qualifications each with an information page. It isn't perfect but the alternatives like OFQUAL are harder to follow.
In conventional terms there are 8 levels from basic to doctorate. University degrees are at levels 4, 5 and 6, 6 being an honours degree. Level 1 is GCSEs graded D to G. Level 2 is GCSEs graded A* to F. Level 3 is A Levels.
The alternative routes include 14-19 diploma, NVQs (national vocational qualifications), HNC/HND (Higher National Certificates and Diplomas) and Foundation Degrees.
I'll try to put in details of these alternatives in subsequent postings.