Rear Seat Bar Torx Size?

I've typically got my pack of torx up to 20 but can anyone tell me what size I need to get the rear seat bar out? The carpet seems to be neigh indestructable too! It won't even pull out lmao!!!
 
It's a T50 but you can use a socket set to remove it too.

Easiest way to get the boot mat out is to lift it in the air 90 degrees and pull upwards rather than trying to get it out flat from the Isofix bar hooks.

Black plastic device attached to the isofix is for keyless entry, that can be praised off nicely with a flat head screw driver, just push the hooks away from the center of the device and it'll eventually come off with some messing about, but don't pull too hard or you'll break the clip.

The clip holding the black plastic cable to the keyless entry also pops out nicely with a flat head, bit of a faff again though.

Removing the isofix bar has solved my car of rattling in the rear, but now I've noticed that my exhaust is slightly tapping the heat sheilds on the splitter, as a result of less buzzzing noise in the cabin :tongueout:

Thanks.