https://www.airshows.co.uk/reports/u...ilton-air-day/
Tried to find you a link that’s in the public domain to provide you with an answer. Scroll down to the sixth paragraph and the information for the GR4 display crew for 2006 is there.
In addition, if you go to the ‘UK Reviews’ tab and select 2006, you’ll find a write up for the Leuchars Air Show that you attended. I suspect ZA588 may have been part of the four ship of GR4s in the Tactical Demonstration. If so, trying to establish who were the crew for it on the day is a far taller order and may rely on somebody here who might have more intimate knowledge than what’s available online.
Hope this helps, even in a small way.