Did the Fleet Air Arm use Hellcats and Dauntlesses?
Short answerIt definitely used Hellcats; Britain appears to have obtained and flown Dauntlesses, but their combat use is uncertain in this answer.
NotesThe two aircraft require separate answers. The Fleet Air Arm used the F6F Hellcat. Britain also appears to have obtained and flown SBD Dauntlesses, but their combat use is uncertain in this exchange. Acquisition or flight does not by itself demonstrate operational combat service.