Sueing for defamation of character due to failing a test? Whaaaat??? If your sister thinks that constitutes defamation she knows even less about the law than I do, and that isn't much.
Sueing on the basis of your word against his? Oh dear God!
The court are going to be in stitches when this case is introduced!
Unvbelieveable. You must be a joy to be around if that's the way you resolve life's little ups and downs. If your altimeter setting skills are as careful and accurate as your spelling and grammar - and what else can one go on? - I know who I'd believe.
Hard to believe a lawyer would think there was even a case to answer in this, let alone win the unequal battle between the CAA and an individual. Is the sister-barrister a completly self-obsessed rookie too I wonder?
Get over yourself fella. Come back to planet Earth...
And best of luck job-hunting if you take this much futher in public- because that too will be an unequal struggle.