And it's quite incredible, after walking aimlessly round Covent Garden with no luck on my last visit to London, this time I went armed with the address, and it still took me ages to find. But it was well worth it
Could have spent hundreds but in the end came away with

Deerhunter - Cryptograms
Paavoharju - Yha Hamaraa
Pan Sonic - Katodivaihe
Fennesz - Venice

All pretty ace and highly recommended