NORMAN has been flown to the Cayman islands, for release. Tropical bird on Heathrow flight home for Christmas - BBC News
After reading the title/headline of this thread, I startet smiling until I realized that I ignored some letters while reading... (guess which one)
Apparently Monterey Bay Aquarium now has a young rescued Red-footed Booby. I suspect it is not on show though.
A wildlife rescue in the Florida Keys has a masked booby on display which is a permanent resident. I can upload photos of it if ya'll would like. It's name appears to be booby according to the signage.
Apologies for the delay in responding to your post (which I've only just noticed). Indeed London Zoo did have red-footed booby in the 1960s. The ZSL Annual Reports for 1960 and 1961 record that a red-footed gannet (i.e. red-footed booby) was acquired in both of those years. Both the boobies received in 1960 and 1961 were donated by Captain D. Scorgie. (Incidentally, in addition to the boobies, Scorgie also donated two Christmas Island frigate birds to the zoo, one in 1960 the other in 1961.)