How easy is it to remove the seat backs and bases? I can do it in a trice on my Mark 2, where there's a simple revolving circlip on the back pivots, and the bases are just held by wire clips. Just requires the bolt holding the central seat belt fastening to be undone. Reveals the true Fabia load capacity!

The seat bases come out easily, the backs look as if they might but I never bothered to try.

There are pivot brackets that look accessible.