Hi there, how exactly do I get the rear wiper to spray water on my Panda? Not sure if I'm being thick. Many thanks

Press & hold the rear wiper button on the dash
or possibly replace/clean out the non return valve somewhere down the pipe down the passenger side that gets gunked up, make sure the pump is getting power & working, then press & hold the rear wiper button on the dash.

Thanks, it must be the non-return valve. Nothings happening.

You should be getting a noise from one of the pumps at the bottom of the washer bottle when you press the switch....if you are but no waters coming out then check the pipe, non return valve and nozzle...if theres no blockage there maybe a leak somewhere so see if you can spot any stray water...when my non return valve failed it dripped from the passenger side rear sill. If there's no noise from the pump check the spade connections...probably just needs a clean. Also I've had horrible stuff in my washer bottle that clogs the pipes when I've neglected it for a long time! Best of luck

Yup, if it's a blockage you should still hear the pump humming anyway - same sound as the front. If you can't hear it start with the connections at the pump first as above.

Confirmed the pump was working. Blockage occurred at the non-return valve. Replaced it and it's all working. Many thanks!