Looking at this year, they don't bother with updating their website till January. It always was the Cinderella of ferries.
Before DFDS closed Portsmouth/Le Havre, they swapped boats, with the bigger one going to Dieppe. Perhaps a lease had run out, but I'd have thought P/LH would make more money. I'm just surprised that its lasted so long. I'm also surprised that P/LH didn't make money, when Britney do, but people will pay their prices for a slightly better boat.
With the caravan, Britney is an arm and a leg, so I'll wait till January, and if Dieppe is expensive, go Dover/Calais
And thanks for pointing out the discount