since u dont rly have two other options i dont see a problem in applying to HR in Aston - u already meet the entry requirements for accounting at Aston, in fact you are one grade above for both GCSE and A-level
for aston i feel like as long as u meet the entry requirements, ur very likely to get an offer, if the course is not very competitive like accounting and HR.
what are the entry requirements for HR? for GCSE and A-level?
i applied to university of birmingham, aston, bcu, ucb, and coventry and i've got all my offers!!
why dont u apply to university of birmingham too??? and then u could also apply for the HR at Aston.