Further to which Wessex (if any) remained yellow, the words of a squadron song came to mind. To the tune of "Teeterboro Tower"
"Hello Khormaksar Tower, this is XT 603,
You're getting all bad-tempered, that's very plain to see.
I'm still a nice bright yellow, they haven't gone as far
As to paint me with distemper; I'm still on SAR"
I don't recall flying it in yellow colours though, so perhaps it was absorbed into the fleet by the time I got to Khormaksar in May '67. In fact, checking the logbook, I first flew it after the move to Sharjah, in Dec of that year.