We are home! ( I am the OP).
We actually cut two days, one in the cottage and one overnight in a hotel, to break the journey. We didn’t decide till this morning. We left after lunch, so there was no rush to pack and clear the house. The journey took six and a half hours, including three short loo stops. There was not much traffic.
Actually this holiday proved quite tricky. DH’s mobility meant that we needed to park close to places, which ruled out various ones. He is no longer able to just enjoy pottering around small towns. Beaches were not easy either as often there was a walk from the car which was too much, especially if hilly. We do not like being in the sun. And I hate the narrow lanes that lead to most beaches. The beaches were beautiful, however. So next time I am going to book a place right by the sea, on the level!