If you fancied buying a gold-plated throne that’s fit for a king’s derriere, you would have to be pretty flush to afford it. At £129,000, it might be money down the pan but at least you would be the owner of a unique luxury loo. It was unveiled at the 11th World Toilet Summit and Expo which, believe it or not, looks at ways of improving the planet’s lavatories and sanitation.