The voids were insulated then clad in ply and then I clad that in upvc ship lap wood grain effect. I have ordered an elec roller door that arrives next week and a hard plastic floor. I can store both bikes and 2 or 3 push bikes in there (two bikes lift up on pulleys in to the roof apex). I will get a digger in to make a parking space in front before the whole drive gets done in resin bonded aggregate.