Just a quick one, as this is really tricky:
This is about removing the rear seat bench and the 2 narrow side pieces of a X-Type 2.5L, 2004, LHD.
I have seen that there are other versions of X-Type, where the narrow side pieces seem to be attached to the back-rest, so that would be different...

In every other car, one would start by pulling up the front section of the rear seat bottom part on both sides. This is also, how I did it on this X-Type, however, I had to apply quite a bit more force and in hints sight, there might be a better way, as I will explain below. But let me start with the seriously tricky side pieces...:


That is the side piece, I am talking about.


At the bottom this clip holds it in place... Seriously? There is normally no way to rip this out without breaking those extra long "wings", but without them (i.e. after you broke them off as per design intend), they would still sit in their supposed location. But as you can see, somehow I got this one out without breaking those wings off. This involved the use of 1 or 2 screwdrivers and quite a bit of wiggling and bending the metal, where it sat in, a bit. Note that this same clip is used for the bottom part of the rear seat...


...and this here is the "hole" where the rear seat clip goes thru: As you can see I can fit my hand underneath from the front (underneath, sideways). So I think once one knows that it should be possible to squeeze those wings together, which should make it a lot easier to pull the rear seat up. And even without breaking the wings off...


Back to the side pieces: This is the upper fixing lug of that side piece...


...and this lug goes into that white plastic concoction with the black triangular lever, which I am moving to the right with my finger...: With the side piece still attached one needs to push the hand behind it to push that lever to the right side to release the side pieces! One both sides the direction to push the lever is to the right.


Above you can see where to find the right lever mechanism...

And removing the back-rest is the easy part: Just remove those 3 x 2 bolts.