Why is the pool at Buckingham Palace a secret?

1958.632 - 1980.972 Heidi Blake

And if you do that, you have hundreds of results. You have a summer warden, a sous chef, butlers, junior footman, a building surveyor. There's a guy who was the marshal of the diplomatic corps. But then, this is when I got excited, then if you add the search term swimming pool, there are three people who are specifically talking about having worked in and around that swimming pool.