Can anyone advise how to attach Intertrim Oddessey fibreglass seats to seat runner on drivers side and passenger seat to the floor, there are no threaded bosses in the bottom of the seats which i thought their would have been.

Don't know those seats but mine were drilled through the seat base to bolt onto the runners - needed a bit of packing at the front to achieve the right angle i.e. front tipped up. Look at www.tillett.co.uk for mushroom headed bolts so they son't protrude under your thighs and are IVA acceptable.
HTH.
Cheers, Pewe

Why not phone/email them?
"Technical advice contact Graham Beech"

http://www.intatrimtelford.co.uk/index.php?option=com_contact&Itemid=3

Thanks Ian
I have just emailed them i will let you know the outcome.

I had the oddesey II and i just drilled through and used big penny washers to spread the load

Had an answer from MNR and manufacturer, the padded part of seat base lifts up and then you just drill through base, i did try this before but i kept getting a ripping sound so i though better ask first, padded seat part is held down with velcro hence ripping sound

Now i know it's easy.