You need more than just a portable toilet to be certified as 'self-contained' the vehicle needs to be able to hold and store a certain amount of fresh and grey-water.
Therefore we have added certified self-contained campervans to our fleet in 2021.
Also, with the new rules for certifying campervans as self-contained, a portable toilet aka Porta Potty is no longer allowed as toilet option in self-contained campervans - coming into action in December 2024.