It would appear that P&O are keeping the Pompey - Le Havre route after all.  Just had a letter from them - I have been a member of their Frequent Traveller program for years.  Letter states that, among other things, the frequent traveller scheme is being chopped, and they are introducing, and I quote 
 "...a new, simpler, low cost, airline style pricing policy.....to ensure that you can easily access more flexible and attractive fares.  Our prices will vary, based on demand and time of booking, offering great value if you book early."
They are also offering special deals on some of their routes, including Portsmouth - Le Havre.
Now you see 'em, now you don't!!!!
DB