P&O Cruises is introducing new sales managers on each ship after seeing onboard cruise sales double in the past two years.

Agents will benefit from full commission on future cruises booked by their customers, sales of which P&O has seen grow significantly in the past five years.

P&O Cruises will also no longer sell vouchers for future cruises, which agents don’t earn commission on.

Customers who rebook on board will have two weeks to change their cruise free of charge.

One senior loyalty and cruise sales manager will be introduced on each of the line’s 12 ships to oversee the existing teams.

The new managers will also run regular events, such as talks on sea days, and educate passengers about the benefits of the Peninsular Club loyalty scheme, to encourage them to book on board.

Paul Ludlow, P&O Cruises senior vice-president, said: “The propensity to book while on board is very high as immediate help and advice is on hand and the happy holiday memories are still fresh.

“These new enhancements will result in even better service, less waiting time and increased opportunities for guests to learn about new itineraries and ships.

“All agent bookings are protected and fully commissionable.”

Alex White, vice-president for sales, said growing the momentum of onboard sales for agent commission was also important ahead of the arrival of the line’s new ship, due in 2020.

White also did not rule out extending the sales plan to sister brand Cunard, but said this would depend on its success.

Onboard booking deposits remain at £50 per person, with additional onboard credit available too.