© Wikipedia
HMS Diamond
One of the most advanced Royal Navy warships, which cost around £1 billion, had to abort its mission in the Persian Gulf and return to the UK. This leaves the country without a seaworthy destroyer as five other vessels are already undergoing maintenance.

The HMS Diamond Type 45 destroyer, which was on a 9-month mission to protect trade routes in the region, was forced to head home after just two months. "We can confirm HMS Diamond has experienced technical issues, but we do not discuss the detailed material state of our operational ships and are unable to comment further," a Navy spokesman said.