Brittany Ferries are starting an 'economy' service or what they call 'no frills'
No prices published yet but I guess will have to be competitive with LD.
See www.brittany-ferries.co.uk for details.
The Santander route could be of interest for a camping trip that I am planning for northern Spain in September with the pajero. If the prices are good I might be persuaded to stay longer in Spain and not wend my way back through France.
BF website shows one trip a week Portsmouth to Spain and 5 Portsmouth to Le Harvre but one of these will be freight only. If you want to be kept in touch, go to the BF website and find Economie and you can sign up for email newsletters.