Route from Portsmouth via Ouisterham/Caen to Bordeaux

https://abetterrouteplanner.com/?plan_uuid=e5d20024-73ce-4be7-91fd-57a916d75eb1

This is a route from Portsmouth via Ouisterham/Caen to Bordeaux. If I try to change the time of departure from Portsmouth it adds in a deviation via Newhaven/Dieppe!!!! “Telling me no valid plan found - This is the best attempt”