Hi Dave
Thanks for the link onto the parts site. Got me baffled. The old part I have is as shown on the diagram on the parts site. Sadly the end I want to see on the diagram is the end I can't see.
I'm fresh back from a weeks holiday and the car has stayed pumped up over that time which is a result. Clearly there won't be a lot of air demand through the pipe.
I've tried negotiating with the Mrs but after what I did to her tights when an old fan belt snapped she wasn't best receptive. As you suggest I'm going to cobble a small mesh filter and fix it to the pipe. Thanks for your help.
cheers
Mike