All Special Offers: Offers apply to all bookings confirmed by 30st April 2017. Minimum duration is 7-night , unless specified. Not applicable to Royal Mystique, Mystique or Horizon boats, unless specified. Offers apply to all destinations and all departure dates, unless specified. Offers are combinable with other offers up to a total discount of 15%. Offers can be withdrawn at any time. Subject to availability. Agents can use.