removing rear seats - help

I have started removing my rear seats. No problem with the base but the back rest is a little more difficult.

How do you remove the shaft at the bottom of the back rest from the eye (connected to the body) that the shaft pivots on?

Thanks
 
what you think is holding the seat base solid to the side of the car rotates. push it towards the boot with a screw driver. its really a hook that locks/unlocks