andym said:
Britanny Ferries offer a night ferry that seems like a good option (I'm hoping to use it in September). The cost of a cabin compares well with the cost of a hotel.
Interesting thread, I've used Brittany Ferries Portsmouth to St-Malo twice and it is eye wateringly expensive, around £160 for two people, one tandem and a cabin - with a window, worth the extra tenner. But you do get a good nights sleep and can have a full day's cycling the next day, and, the restaurant is much more civilised than you'd expect on a car ferry.
I was interested to look at
Condor Ferries, but for me the crossing times and the start from Weymouth don't add up. It's one day's cycling from Horsham to Portsmouth, but it would be two to Pool, as we'd never get there by the start time. Then you'd have to spend a night in St-Malo as they don't arrive until the evening, however you do it, you'd probably eat up the £80 you saved.