I want to know the answer to the following question:
Who is the only reigning Monarch to have visited the island?
All the background I'm provided with is that "One commentator has observed that, notwithstanding the high unemployment resulting from the loss of full passports during 1981–2002, the level of loyalty to the British monarchy by the St Helena population is probably not exceeded in any other part of the world.". Is that enough to answer the question?