Set to join the P&O fleet in March 2015, the greatly anticipated 1,082ft (330m) cruise ship Britannia, which is 20ft (6m) longer than the Eiffel Tower, will boast expanded wellness offerings at sea.

The ship has 15 public decks for a maximum of 3,647 passengers and 1,400 crew members, in addition to a signature Oasis Spa, alfresco terrace bar called The Retreat, plus the first Oasis Villa, salon menu and spa shop.

The Oasis Spa – to be operated by Steiner Leisure – will feature a hydrotherapy suite with heated loungers, waterbeds, a salt cave, a hydrotherapy pool providing reflexology, massage jets and air recliners.

The spa will also encompass 17 individual treatment rooms.

The new build cruise liner will include the fleet’s first Oasis Villa, which is a private zone for couples or groups, comprising an individual whirlpool and spa therapist.

The menu at the spa will be extended, for example there will be a list of seven advanced facials to choose from.

Product lines available at the spa have been added to the menu to include Elemis, La Therapie, Phyto, Bliss and Sebastian. The new Spa Shop will stock retail products from these companies.

The salon blowout menu, which includes blow dry, hair styling and makeup application, will debut at the ship’s hair salon.

Britannia will also have four pools as well as a gym and dedicated sports space called The Arena for short tennis, cricket or football.

A total of 13 dining experiences will be open to passengers, plus a chance to join P&O’s newly developed Cookery Club where cooking classes are delivered by leading chefs, such as British chef James Martin.

There will also be a theatre venue with an LED light feature wall, a £1m art collection and an extensive shopping area onboard.

Britannia’s maiden cruise is a two-week journey from Southampton, UK, to Gibraltar, Barcelona, Monte Carlo, Rome, Ajaccio, Seville and Cartagena – starting on 14 March 2015.