Thanks Gafferbill,
yes looked at the website and yes the newer ferry takes vans. Looked at prices and seems car+van+2 will cost me about 52 euro which seems a lot for saving 120 miles. Might divert further south and east en route to meet up with friends we made last year. Want to get to Isle de re before the change in bridge toll. Missed it be a day last year - ouch!.
Thanks again for your help.
Graham