I have a T reg Fiat Punto 60s and the current problem I have is that the rear heated windscreen is not working. It's currently de-mis the top half of the windscreen and not the bottom. Any ideas? Many Thanks

Check that the connections are not broken. You can usually join them together with a bit of silverpaint if you find the part that is not connected.

Thanks very much Joel for that, I'll have a closer look for the missing connection

Check the fuse for it as well

Your user manual should have a list of all the fuses and their functions.
Go to the fuse panel beside your right leg in the drivers seat and take out the fuse for the demister - if the little wire in it is broken, replace it.

Fuse for rear heater is No.11 in fusebox, a 20Amp (If it's a Mk1, right?) BUT if it's broken it won't be working at all not just half. I can't think of anything it could be other than bad connections because all it is is an electric current splitting through all the wires in the glass.