Why did the Royal Air Force operate Bangor-class minesweepers?
Short answerThey may have supported pilot-recovery work at sea, although the identification is tentative without checking a source.
NotesThe explanation is offered from memory rather than as a checked conclusion. The vessels may have supported pilot recovery because aircraft frequently went down over water. That role would account for the Royal Air Force operating small seagoing craft. The identification remains tentative until it can be checked against a dedicated source.