I don't think a no-fly zone would be a possibility at the time. For a start, the idea didn't exist at the time, and second it would have been unenforceable without subsequent technological developments. No planes after Versailles is probable though, as is increased bomber panic.
I agree its not really enforceable, but its not a very complicated idea so it might get put on paper
any ways King George V becomes a martyred saint, maybe the second Saint the Church of England has, I'd guess a lot of War monuments would be of him, WWI is in a lot of ways the birth of New Zealand and Australia nationalism, if the war is now nationally tied in the mind to the Death of a loved king we may see New Zealand and Australia a lot closer to the UK
King Edward VIII had a lot of daddy issues, Daddy dies a Saint hard to say what happens, ether David is driven to live up to his father or what he did in OTL keep rebelling against dad even when he's died
Ireland! oh man, King George V was a key force in forcing the Government to the table with the IRA, I'm unsure what Edward VIII would do, if he tries will the PM will listen to the young King, and if he does will the King be able to call on General Jan Smuts the way his Father would have? also in OTL Edward was more popular with the Irish, if he takes the wrong tone at the wrong movement could set off the Unionists in the worst way.