Whether its relevent ? i booked at the earliest oportunity last autumn, and ended up watching the prices go down right up the the week before i was due to sail, a period of nine months, i complained to P/O and was told that market forces determine there pricing structures, booking early simply secured my crossing for that period, but did not secure any saving.
Still bugged by the issue , i checked the cost the night before i went, it had gone up by