A German friend's flying into Luton on Saturday 1pm with her 3 kids, youngest is 5. She saw on google maps it is 5 and half hours to St Ives. I thought it took hours to get to Cornwall in the summer, but I've been out of the uk for years. She has already paid for a mobile home in St Ives for Saturday night so she doesn't want to stopover, but I'm imagining nightmare jam scenarios - should I strongly encourage her to stop off overnight eg near Bristol? Any tips for last minute rooms if it all goes wrong? Thanks for any help!