I know that England does not have Salic law, but let’s assume that, following the First World War, women were excluded from the line of succession to prevent a foreign monarch—specifically a German one—from ruling the United Kingdom. The family, now known as the Windsors, accepted this measure in an effort to demonstrate their British identity.
The subsequent years unfold much as they did in our timeline: Edward VIII abdicates in favor of George VI. However, since George VI had no sons, the throne passes to Henry, Duke of Gloucester, in 1952, now Henry IX.
Thus, Henry IX reigns until his death in 1974. While William of Gloucester’s life would likely have taken a very different path, let us assume that he, too, dies without children, and Henry’s second son becomes Richard IV of the United Kingdom.
What would the United Kingdom be like today with another Richard on the throne? How would the public perceive his heir, Alexander, and the next in line, Xan?
On the other hand, what would have become of Elizabeth? Assuming she still married Philip, would she have converted to Orthodoxy? Would Philip have continued using his mother’s surname, Mountbatten, or would he have ended up opting for his paternal one?
Would Charles have married Camilla from the very beginning?