OK so my rear washer wasn't working, suspected washer pump as there was no sound when the button was pressed. Bumper off, switch the two pumps around so that I know it's the pump and not the wiring. New pump needed.

Found one on eb*y, arrived very quickly so fitted it this afternoon and it works great.

HOWEVER there was a small squirt of water out the back wiper then nothing. Pump's pumping away but nothing's coming out.

Remove spare wheel carrier and pop pipe off just before the one way valve, still no water so it's a blockage in the pipe somewhere.

Removed pipe off washer pump and gave a good blow down it til I was seeing stars popping, nothing.

So where I stand at the minute, I either find something that blows harder through the pipe, or I try and locate a map of where the pipe goes through the car.

Any ideas?

I think it goes along with the wiring loom on the left side of the car, behind bonnet release handle, under the door, over the rear wheel arch, left side of boot and finally tailgate

only have one picture where it shows

Thanks for the reply Baptista.

To update, I had a brainwave last night and went out today armed with a reel of strimmer cable and tried to feed it through the pipes. It worked up to a point but seemed to get stuck at what I can only guess are connectors or valves. Got a good metre or so into the pipe at the front, but less going through the rear pipe. Tried to squirt water, still no joy.

Next I decided to see why the strimmer cable wouldn't go so far in the back pipe. Followed the pipe through the tailgate door hinge area and removed the boot panelling to follow the pipe. Not far into the boot you can see the pipe withing the wiring harness, but there was another connector/valve here. I pulled the pipes off and checked the valve, it looks like another one way valve. I checked it was free then blew down the pipe from here, blowing some milky crud out the back pipe. Stuck it all back together, tried the rear washer again and hey presto! We have water on the back window.

Well done !

Thankyouverymuch Sir! And happy St George's day.