What is the highest altitude on Pitcairn Island? If global warming raises the sea level a few more feet, will it be submerged? And if so, will England abandon any further claim to it? If so, the sun will set on the British Empire.
Prince Edward, Earl of Wessex, has variously used the names Edward Windsor and Edward Wessex.
(Mentioned in Wiki article.)
Highest point is 347m. Rising sea-level would take out Diego Garcia first, it being a coral atoll, thus breaking the chain that way.