Heated seats just stopped heating?

Nope square.
Here's a picture.
Just had a look under one of the seats and there are loads of wires and several connectors.

 

That's aftermarket as others suspected earlier.

It's just a case of whipping out the multimeter and working your way back from the switch/seat to find the break in the circuit.

 

Thanks all.
Looks like a trip to my friendly indie. I wouldn't know where to start.

 

If you look at the fuse board can you see any lose or different type fuse carriers like one has been added? If so that's probably for the seats

 

I will have a good check around when the weather warms up and dries up a bit.
I had a quick look under the seats and there are loads of wires and connectors.
Nothing obvious in the rear fuse board in the boot although I do find the fuse chart very difficult to follow.
I believe there is another fuse board in the passenger footwell under the glovebox so will have a look there.
It would be nice if it just turned out to be a tired fuse.