I was really thinking of operating the RAF from inside France, around this date for example.
Dunkirk could follow using RAF from England trying to stop the Germans bombing the beaches and ships as the noose tightens around Dunkirk at the beginning of June.
Then you are into the BoB. This would give you the RAF attacking off English territory you are after but in keeping with history.
You can easily use hud messaging to get people into the right place with no need for a briefing telling them what to do, and that way you can avoid giving out too much information in advance and having them spread out all over the place.
Can we have a chat on comms? How can I get hold of you? I'm on our TS3 on Sunday evening, 85.236.100.27:24637 It'll be easier to just talk about it and then you'd get a better idea.