em yes i would think so. i could be wrong but i really don't think it would be legal.
well there is no support really for the passengers if there are no seats, so even if they were wearing there seatbelts and there happened to be an accident they wouldn't be supported or like held in place like they would be by the seat. that's just my opinion though. if it isn't against the law i'm sure the police would find something to do you for, that's normally the case here anyway.
Yeah I'd never want to do it because it's really unsafe, but was just curious that's all!
Had a word with ex police guy who comes in to the pub I work at and he said it's definitly 100% illegal and basically said what you said Reuvers