Feedback and Data Protection Act...
I've asked about feedback - NATS says it will now give feedback to candidates following the Assessment Centre Day, which great if they really mean it. They don't give feedback from test days because it would be pretty pointless - a computer scores the papers and a yes/no answer comes out.
It's a case of "computer says no!" - if you ask for more info under data protection act they will probably give you the figures to back up the answer but it will still be a "no".
The personality questionnaire is not used, as far as I know, to make the decsion about calling people for interview.