27 hours of tech and operational delays by Thomson is not an exceptional circumstance they can use to wriggle out of
so you will get paid out - just persevere do not give up
copy to and get P&O to pressure the airline as well and frankly P&O should have looked after u better so insist on an OBC for a future cruise
if Thomson want P&O's flight contracts in future then thomson have to try harder ) note P&O have gone with Virgin on some cruises now)
good luck but i am sure you will get paid out