Ok, my contact phoned today and there's good news and a little bad news.
The good news is that they now have the updated monitors in their warranty centre, they come with an updated panel from LG.Philips. My contact said WU3 instead of the older WU2, but the only WU3 I can see is a TN - so I'm sure it's either a new part I cannot find any info on, or my contact has it wrong!
Anyway, the bad news is that those of us who decided the Silver model was sexier have to wait until the 12th of August and, if the new model is decent, will have to put up with people with black models crowing about how good they are!
Edit: I suspect my contact got it wrong and we're getting the new LM240WU4 which is a 102% saturation IPS panel with 5ms G2G response time.