I've no idea when this actually happened, but it seems the IWF (Internet Watch Foundation) have re-designed their website.
Quite why they've done this is a mystery. However, one thing is clear - it's no longer as simple to report anything to them if you have flash/ActiveX disabled, and don't know the direct URL to the report form (it's https://www.iwf.org.uk/report by the way).
Unfortunately, they've messed something up, as going to it without the www. prefix results in an error;
I'll get in touch with them to get the error fixed, but if you're like me and have flash/activeX disabled, then you may want to bookmark the direct URL.
As an aside, everyones obsession with ActiveX/Silverlight/Flash/Java/Ajax etc etc etc, really is annoying - especially when having them enabled is HELPING the bad guys.