Going to fit seats and harness's over the chrissy hols and just wanted to check before doing so.I was going to use 4 bolts fitted with penny washers,through the bottom of the seats(intatrim) to fix them to 2 pieces of box section which run the length of the car.Will this satisfy Mr sva?.

Most likely - we have ours on aluminium tubes (upright) secured to flat steel braces across the floor by means of high tensile bolts. Ours passed... good luck with SVA

Should pass on the seats, but if that's your car in the picture, the front wheel arches don't look like they cover all of the rims.

Leigh.