Mmmm, it can be registered as a two seater if its been complied that way ( say to meet weight requirements - we did a Dodge van and its registered as a 2 seater, but they put the seats back in as soon as it was done and will have to take them out for next wof - its the cool one that Farnleys Jetkis use to promo their sales, parked on moorhouse most of the time), or you have it certed
Your fine for a wof as long as there are no belts for the seats you have taken out
And interior trim you are fine to fang round for a few days while your doing work