Amy too is quite 'London' its cool you like that sort of thing, and you're right with the Tesco thing, grocery stores all over the country, not really
walmart, maybe a bit more 'Publix' like?
look up some Natasha, she's a bit more 'girly' but has some really good lyrics.
Its quite nice i guess that some of our chart regulars are having success in the USA, we're inundated with US singers in our charts.
othergreat current UK bands
Snow Patrol - look up Chasing cars
Razorlight - America and Before I fall to pieces
Kasabian - look up 'shoot the runner' especially
oh, and don't miss The Fratellis, Chelsea dagger is excellent