Yep. That's what happened. We were delayed deboarding that day and nearly everyone missed their flights, etc. On that day, Princess lost a lot of money, that's for sure. It took 5 months to get it back from Princess corporate.
The evening before, we were overtaken by the P&O Iona on the way back. The Iona made it on time into Southampton that morning, before the channel was closed for the regatta. The Sky didn't. Max speed of the Sky was 19 knots that evening. The regatta is a yearly event for decades.