Well result eventually, 8mm plumbing
pipe and water option didn't work,
pipe was just too inflexible to get into the space, and couldn't get a decent seal from the
pipe to the hose, so abandoned that and got a length of brake
pipe and local tyre fitter let me use his air hose, taped the brake
pipe on the end of the air hose and hey result in about 2 mins, highly recommend the brake
pipe option to anybody doing this, it is just so much more pliable and easier to work with and the smaller bore concentrates the air better as well I think, was great to pour water into the tray and see it run from the drains under the car. Did the orange drains in the tunnel as well, but managed to puncture one

however quick call to the dealer and twelve hours later and £22 lighter had a new one, impressed that the parts guy manged to get the right part to be honest from some of the horror stories on here. Getting the transmission tunnel cover on the drivers side back on was a bu**er but all done, just waiting on the mats to dry out properly and job done
cheers