There are currently some good offers at Tesco, details here-
http://ccgi.quaffersoffers.co.uk/cgi-bin/qosearch10a.pl?supplier=Tesco&grape=Any&country=Any&colour=Any&from=Any&to=Any&desc=&meta=all&btn=Search

Six I have picked up, -5%- (*****)
Casillero Del Diablo Cabernet Sauvignon 2005 @ ?3.99 ***
Peter Lehmann Semilonn 2004 @ ?3.74 ****
Tesco Finest Gavi 2005 @ ?4.49 ***
Tesco Finest Gigondas 2003 @ ?4.99 ***
Tim Adams Clare Valley Riesling 2005 @ ?5.99 ****

And I treated myself to a bottle of-
Tim Adams The Fergus 2004 @ ?7.49 ****