20% Off Dover Calais

20% Discount on Dover Calais. Travel from 15th April ? 22nd July 2013 Offer is 20% Off Dover to Calais only travel and is valid for travel from 15th April 2013 ? 22nd July 2013. Valid against a P&O Ferries car or motorcycle booking. Discount applies to the price of your original booking prior to any booking surcharge being applied. Voucher cannot be redeemed against day return bookings. Excludes travel 23td May ? 4th June 2013.