Tunnel, we used to do Newhaven to Dieppe but he crossing takes so long it's not worth it, far better to drive for an hour longer and go via tunnel.
We do a stop off at Honfleur for lunch, little detour but a very pretty town to grab a bite to eat, and we have a connection there with the town mayor who closes off the town hall with a policeman there to make sure we get sole use of the carpark while we eat lol