DS2 in Y12 is set on doing History at Manchester or Bristol university but frankly his GCSE results were not that stellar. He's bright, interested, but a typical teenage boy with a short attention span. He's chosen Manchester & Bristol because they are 'cool' 
How can I find out if his GCSE grades are good enough? I can't guarantee he'll pull himself together for the Y12 exams either.
And any suggestions for work experience or other activities to enhance his personal statement? I don't want to distract him with essay competitions etc given he needs to pull his grades up.
Thanks for any advice.