Adam,
According to a 198 Squadron website, they aren't so sure that RB222 ever flew was assigned to them.
See:
http://www.198squadronraf.co.uk/198sqdn_018.htm
They suggest 183 Squadron as HF-K...
Also earlier thread:
http://forum.12oclockhigh.net/showthread.php?t=3520
Unfortunately this all doesn't anwswer the question who the pilot was.
Regards,
Leendert