Cruise & Maritime Voyages has halved the cost of most 2016 and early 2017 cruises throughout November 2015.

The deal means couples sharing a cabin can get one berth for free. As an example, Marco Polo’s seven-night voyage to the Norwegian fjords round-trip from Tilbury costs from £485 per person, down from £969.

The 50% discount, which also applies to single passengers, excludes Magellan’s world cruise, Astor voyages and CMV’s river cruises.