@JamesT2992 , I think we're on a slightly different page. As I understood your post, you're yet to verify that:
- the washers work & don't leak
- that anything is even plumed in (there could be no leak because the washers aren't leaking, or there could be no visible leak because the washers aren't even plumed in or have been blocked off by a previous owner who was fed up of them leaking!)
- the pump works & creates sufficient flow & pressure
You just know that at least one of those must be false, in order for the whole system to not work. With this in mind, I'd check the 2 easy things first.
Replacing the pumps are easy if you investing £5 in a wiper arm removal tool, or they're a complete pain in the wiper arms refuse to budge. Pop the plastic covers off of the wiper arms, unbolt & remove the wiper arms, unclip the scuttle panel trim from the wing and remove it, unbolt the wiper mechanism & motor (IIRC), unplug the two feeds to the two wiper motors, pull the whole washer bottle out & then the motors just pop out (best to do this off of the car to make sure the o'rings are properly seated). Removing the wiper arms can be a 5 seconds job, or an absolute pain.