27 Sep 2010 11:38 PM:

 It looks like Brittany Ferries have announced they're going to take on the route (eg. according to VillaSeek blog and a few others) --- though yeah, I'm not sure if it's going to be as cheap as the P&O ferries one. Of course, Brittany already do the Plymouth-Santander crossing. I think this new route might not happen until summer 2011 though, so it might not really be any good for the OP.

Tom

Thread: Withdrawal of P & O Portsmouth to Bilbao route

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