Correct, it is London. I came back a little over a week ago and as soon as I have the time I'll post some more pictures + the longer version of the whole story.
Besides London I also visited Sheffield and York. It made me super happy to discover a store with a rather comprehensive range of fair trade jewelry (amongst everything else). Here are pics of my wonderful pieces, that have already been in efficient use. They are from York, which has had the status as a 'Fairt Trade City' since 2004.
Silver plated copper ring (India)
Bicycle rubber earrings (India)
Beer bottle cap earrings (Africa, Kenya)
Bicycle fragment earrings (India)