Yes,! They do require gas and electric test here in Hungary but the mot is every 2 years. the down side for any self builds is they have changed the rules if it’s registered as a van then the mot now has to have pictures of the rear of the van empty They have for years always taken pictures of the vehicle and the instrument cluster ( mileage/ no error lights ) lots of sellers of self builds now sign of things to come in the ukMH insurance seems to be prone to big rises and many are adding conditions such as must have gas and electrical certificates alarms,and many other conditions that were not on their list a couple of years ago,along with others no longer offering cover for expensive or self built