Hello everyone. I am a 20 Year ATC, and have experienced the dread that is felt during a loss of situational awareness. It is a horrible feeling when you mix up a radar ident or an extra track appears in your jurisdiction - and you have no idea who the hell that is. Is it a new aircraft that's busted your airspace, or is it someone you forgot about? Sometimes it is pilots changing their callsigns during a flight (spending the last 10 flights in a particular C172, then jumping into another one for the first time). It is a terrible feeling and one that EVERY ATC will eventually need to contend with. Stop departures, establish identification, maintain separation and pass traffic. Then report it and hope for kind treatment.
Recognising that even the best of us will get into this situation, I am personally reluctant to recommend a trainee for a final check until I have seen how they cope when their best laid plans have fallen into a steaming heap. Anyone with a half a brain can do ATC if they have the right training and all is going to plan. Not everyone can dust themselves off, re-organise a herd of cats and establish a safe situation. Until I see that a trainee can do that, and will do it again when they are working without direct supervision, then I prefer to see training go on a bit longer.
In this case, the check may well have been a relevant factor. The big problem with being under check or training, is that you are the slave to two masters. You have your job to do, but then you need to also think about how the Check Controller wants you to do that job. It is like thinking in a second language - everything needs to be considered twice, and it's tiring. It is even worse if you are getting little 'tips from the Super-Coach' while you are trying to work. Nothing you ever do seems good enough.
Managing interaction with a trainee or candidate is a very difficult thing to do properly - one I am still working on after many years.
Without knowing enough information about what happened here, it calls out to me that something strange is going on when the check was allowed to continue after the first 'incident'. In today's workplace environment, and reading between the lines a little, I speculate that the writing was already on the wall for this particular candidate. The pressure of this check was amplified by the fact that their job was on the line, and the check controller felt they needed to collect ample evidence to support their assessment as 'not suitable'. I can certainly relate to both sides of that fence.
We all just do our best, support our colleagues, report our learning experiences and call out for help when we need it.