Blacksheep, my dad and his fellow members of Bomber Command would take issue with the comment:
BTW. There's no flak over the target. They don't want to hit their own night fighters....
There most certainly was and it was a very brave / determined / insane night fighter pilot who followed the heavies into it. Most didn't, they knew where the bombers were going to be when they came off the target and waited for them there.