Here in London I have only one stamp/scrapbook shop, (Blade Rubber Stamps) and it's quite expensive, nevertheless it's a lovely little place. Personally I don't like to shop on line. Most of the time I don't have a choice and if I really want something I do order few things on line occasionally.
The good news is that we have once a year a huge stamp/scrapbook show in London, were I get most of my stuff from.
Alexandra Palace (venue)
I just went to the show this year (24th September 2011) it was lots of fun and I found a few bargains.
The venue is located in a very beautiful area it feels we are not in London.