Ok then, we'll have half a dozen Yanks to fly with McCarthy in a B17. We know about the dog which we'd better have in yellow rather than black. A bit of sex in the mess just to spice things up a bit and lets give the enemy a more human side whilst we are about it. Concentrate on the victims not the heroes, bags of computer graphics, we'll get Glenn Miller into no. 2 hangar for a wheeze and lets see Gibson throwing his VC into the River Ouse as an act of contrition.
Was the Great Escape accurate - no, Longest Day - no, Zulu - no etc etc.
If Jackson wanted to make a new fictional movie on the subject of the sacrifice made within Bomber Command, then fine, no problem. Perhaps he could attempt a decent rendition of Birdsong after the recent weak BBC effort.
If you want absolute accuracy, which after seventy years will be difficult, then go and read the documents and books, then exercise your imagination.