Where are all the UK (& Irish) start-ups?

Where are all the UK start-ups? (plasticbag.org) You could say the same about Ireland - Ireland has a real strong tech scene - but that is primarily driven by the likes of Microsoft, Intel, Dell, eBay, Google, Yahoo, etc who all have bases in Ireland. The start-up scene is getting better - but to pose the question in the context "Where is the Blogger or Flickr or Odeo or Six Apart of Ireland?" - all who are web2.0 companies - they are thin on the ground. Here is an insight into the struggles of doing a "web2.0" in Europe We hope to change that !!