Once stripping all the parts from underneath i had a closer inspection of the sills and floors and thought id see how solid it was as i noticed a small area that was bulging through the 95 layers of underseal lol. So i attacked the inner sill/floors on the passenger side with a pry bar and grinder and this is what i found.........(this is 2yrs ago)

Passenger side front inner sill and floor

Passenger side inner sill and floor in the centre area

Passenger side inner sill/floor towards the rear door

as you can see the garage i took it to did a half job they put the outer sills on then made l-shaped plates welded to the floor and the lip of the sill and didnt cut the old metal out then on top of that they put a smooth layer of body filler over the top of it and undersealed so when i took a look at it it looked like a neat job but was really a well hidden botch. Ive not started investigating the drivers side but it will be the same, once the car has been moved to its new location i will be doing all the welding there for now i need to get it back on its wheels to move it from where it is.