It’s due to unload at Southampton on the 29th now. It added a stop at Spain.When I look at the schedule for morning peace. Its crazy that it docks in Southampton on the 28th, unloads and load onto car transporters on the 29th and leaves on the 30th. Not much room for slippage seeings it's still over 2 weeks of sailing.
The cars are most likely on RCC Europe.
It must take a good few weeks to hand out one ships worth 4500 cars.