The huge tabular blocks of ice that frequently break off Antarctica get swept towards the Atlantic and then ground on the shallow continental shelf that surrounds the 170km-long island of South Georgia.
The future of the Royal Navy’s ice patrol vessel HMS Endurance may remain in doubt well over a year after it nearly sank in the Straits of Magellan and returned to Portsmouth on the lift ship MV Target, but there is no doubting the UK’s ongoing commitment to the Antarctic Treaty.