............never fear, the solution is here!
What total ballache to sort the windscreen washers out. I'd heard on the grapevine that when they go weak it's the filters in the washer bottle that cause it & that ain't wrong.
2 bloody hours from start to finish to get the arch liner out, the washer bottle out, clean the crappy little filters (the size of my thumbnail) out & put it all back together again.
Fixed the pop up headlight in my mates Lotus Elan afterwards in half the time!