This is the best summary I could come up with:

A Royal Navy aircraft carrier has failed to set sail for a Nato exercise, a week after its sister ship pulled out because of a mechanical fault.

However, the £3bn warship has remained in Portsmouth and the harbour mouth has been reopened to normal marine traffic.

Hundreds of people lined Portsmouth Harbour to watch the carrier’s scheduled departure at 12:15 GMT.

However, after MoD police boats secured the area and the harbour mouth was closed, the channel was reopened and the crowd dispersed.

Last Sunday, HMS Queen Elizabeth cancelled its deployment to the exercise off Norway at the last minute, after an “issue” was found with a coupling on the starboard propeller shaft.

In 2022, HMS Prince of Wales broke down off the Isle of Wight, when it also suffered a malfunction with a coupling on its starboard propeller.

The original article contains 238 words, the summary contains 139 words. Saved 42%. I’m a bot and I’m open source!