Thanks guys for your replies,
I have since downloaded the Adobe Reader which offers to install a pdf reader as a Safari Plugin. This has solved my problem; I am now able to read the AIP docs online.
However, it is quite a drag using the pdf links.
I have been keeping an eye on a few smart phone apps which incorporate the online data in a convenient, easy to read way. The only trouble is the developers have been having legal trouble with Airservices who claim their copyright is infringed by these apps. One developer, who brings ERSA to the iPhone/iPad claims his app is just a browser like any other we already use to access the information of Airservices website. But his browser caches the data (let's face it, it's not much use if we can't read it offline) and this contravenes Airservices User Agreement. But the app is nevertheless currently still available and I understand he may attempt to do the same with the AIP.
Kind regards,
rubber