Have been getting water in the front passenger footwell and no puddles under the car front and rear where the sunroof drains should discharge.
Managed to get the fake air intake off the LHS - but it was a real battle - to access the front drain exit.
Used heavy brush cutter line to clear the tube. Pushed it up then attached to a drill and gave it a bit of a whirl. Lots of crud came out.
There's some good pictures here DISCO3.CO.UK - View topic - Sunroof drain (NS) where to re-route or how to acess inside? to find the rear.

Now free flowing in time for the rain that has just started.