The UK Border Agency already had a concession for those applying to study A-Levels in the UK which allowed students applying to study A-Levels to make an overseas visa application based on a conditional offer. GCSE results are not released until the end of August. This is somewhat inconvenient for students as some A-Level courses start in early September.
On 5 June 2009 the UKBA agreed to extend this concession to cover all students waiting for GCSE results who wish to study A-Level equivalent courses, such as Higher Diplomas.
You will still be required to submit an unconditional offer as soon as you can, and the visa will only be issued on this basis.