Snapshot and Amazon S3

Hi, I was having some issues getting Snapshot to talk to Amazon S3 and then realised it seems to be to do with the location of the bucket. If I choose the standard EU (Ireland) location than I can choose that location in the dropdown and it works fine. However, if I choose the (I think new) London location and try to enter the location manually ( it doesn't work. Have I entered the location wrong or does the plugin not like the new location yet?