His Serene Highness Prince Hans-Adam II of Liechtenstein isn't feeling very serene at the moment. In fact he's miffed. He bought this painting - Sanchez Coello's The Infante Don Diego - through a London dealer in 2006, but the UK refused him an export licence. HM Revenue and Customs has been dragging its heels over the issue ever since. So the prince has refused to release the stars of his collection of paintings for a major exhibition at the Royal Academy of Arts. Who cares about a few paintings from a piddling principality? you might ask. Oh, the ignorance of some people! His Miffed Highness is the world's sixth wealthiest leader with an estimated pot of USD $5 billion! So the stars of his art collection are not to be sniffed at. HM Revenue and Customs, get your finger out and keep the fat cat happy.