P&O Cruises UK extended the pause in operations into April 2021 due to the current uncertainty around ports of call in Europe.
P&O UK's President Paul Ludlow said:
"With hopeful news headlines clearly we do not want to extend our pause in operations any further than absolutely necessary, but given the ever changing guidance around international travel and the varying regulations in many European ports of call we felt it prudent to cancel these additional dates.
"In addition, as the final payments are due for these cruises very soon we felt it was the right thing to do for our guests.
"We are so sorry to disappoint those who were due to travel but really hope they will re-book for later in the year or for our new programme of 2022 holidays which went on sale earlier this month with strong demand, showing great confidence in cruising in the future."
All passengers with bookings on a cancelled voyage will be notified and will automatically receive a 125% Future Cruise Credit (FCC) or alternatively a 100% refund via filling out a web form.