HTC Hero / Lancaster running Android and "Rosie" UI launching on June 24th?

While the Economic Daily News doesn't cite any sources, its claim that HTC will launch its Android-powered Hero handset on June 24th makes a lot of sense to us. Something's up on that day since we've already seen the press invite to a June 24th event in London, the same place that witnessed the launch of the HTC Touch Diamond last year. The EDN reports two variations of the Hero: one without the QWERTY and another, the HTC Memphis (better known as the HTC Lancaster around AT&T) with full keyboard in tow. What confuses us though is the EDN claim that the Memphis/Lancaster will be an AT&T exclusive for 6 months when it ships in Q3... so why the London launch then?