These are scans of the back and front of a little advert/flyer that came with my Hyde Park tickets.
The tickets arrived with the advert a couple of months before the gig (from what I remember) and as you can see it says "new album coming soon this summer". And that was in 2004. The next album didn't come out until May 2006. And they can't be talking about the Greatest Hits because that was release November 2003.
I guess the album was a lot nearer a release than I realised.