Petit Bot bay on Guernsey.

Sandy, sheltered, good coffee (ie not instant) at the cafe. Ducks and ducklings walking up and down.

But very popular so get there early and really needs a car as at the bottom of a steep hill.

For a bus accessible beach, L'Eree is super with view of distant lighthouse and Lihou island.

Finally, cross from St Peter Port to Herm and go to the Shell beach on the far side of the island. Long sandy beach and completely unspoilt.

Adam