Quartz on 30 March 2007
While on the price cut theme, retailers are taking it upon themselves to deliver the price cuts of the PS3...
Just days after the European launch, Manchester-based retailer Aria.co.uk slashed their price to under £400(from £425)
From BIG LINK!
I suspect the shops are starting to maybe do bundles which appears to make systems cheaper?
EDIT* Sorry it seems that report is rubbish Site In Report
Good to see this site is still going 
Essay Pro