Christmas getaway passengers have faced disruption amid long queues towards the Port of Dover and train cancellations on a major route.Ferry passengers faced delays on the approach to the Kent port on Sunday morning as nearly 30,000 cars were estimated to embark on outbound sailings during the festive period.Peak traffic at the port will be between 6am and 1pm, when P&O Ferries, which operates some sailings from the port, urged customers to allow extra time for their journey.