Adam added this interesting information about the badge:
Fred explained their badge.Irish legends have it that two giants wanted to claim the land as their own. As they waded towards the coast one cut off his hand and threw it so it landed on the land (Ulster) first, hence the red hand.
I know that after 264 Fred joined another Defiant unit 515 Squadron that had a system named Moonshine, it sought to replicate large formations of bombers to confuse the German Freya radar system. It was a dangerous mission as the Defiant was unarmed in this version.Regards Adam