Ricketts was not at Fitzroy when the Galahad was hit. The senior Welsh Guards officer aboard - who didn't take advice (given by Major Ewen Southby-Tailyour RM) - was Major Guy Sayle.
Sayle's daughter now runs an orgy organising company called Killing Kittens. Google if you feel inclined (pun intended).
I saw Lt Col Ricketts with his HQ staff at Fitzroy later in the day after the Galahad was hit. It was dark at the time so I guess it would probably have been early evening, as shortly afterwards we began digging new trenches for the Bde HQ some distance away from the settlement.