How do you scrap a nuclear submarine?
The UK is facing a £7.5 billion bill to dismantle its 20 defunct vessels
The UK defence department has not scrapped any of its 20 defunct nuclear submarines in more than three decades, according to a recent public spending report. Storing the vessels has already cost the government around £500 million. But why has the UK left these submarines in dockyards for so long – and how difficult is it to dismantle them?