‘World’s most valuable stamp’ goes on show in London ahead of auction

The ‘world’s most valuable stamp’ is in London ahead of its auction in the summer (Aaron Chown/PA)

The world’s most valuable stamp, estimated to be worth 15 million dollars (£10.7 million), is in London ahead of its auction in the summer.

The British Guiana One-Cent Magenta stamp, said to be the sole survivor of its kind, can be viewed at Sotheby’s auction house in Mayfair from Wednesday.