Thorntons is a good shout.
I reckon book shops like smiths will be dying out, I go to smiths to buy magazines and thats it.
They don't sell many good, classic books or do buybacks. And they're missing out massively by not stocking or having ordering facilities for academic books, sheet music etc.
They kind of deserve to go under truth be told for not operating like a traditional bookseller should.
They're treating it more like places like HMV did, stock the latest stuff and hope people buy it - which will never work today because the "mainstream" market is going digital.
Had they offered services that traditional shops do, they might be ok.
I buy a lot of music on vinyl and tape still, along with the obligatory CD's, the guy I buy from, his business is booming! Because he found a segment who actually still buy hard copies.