"We are very pleased to welcome you, our valued customer, on-board and we will always do our best to accommodate your needs, as well as the needs of your drivers.
We must advise however that drivers are frequently remaining in their vehicles during the ferry crossing, which is strictly forbidden.
Please note that for safety and security it is illegal under SOLAS Chapter II-1, Regulation 23-9, for any driver to remain in, or return to, their vehicles whilst a vessel is at sea. All drivers must vacate their vehicles once parked on-board and make their way to the driver’s accommodation area."
P&O Ferries