Spoilt for Choice - Springboard, UK based startup incubator
springboard.com
springboard.com
[1] - http://www.economist.com/node/17581736?fsrc=scn/fb/wl/ar/the...
[2] - http://www.ukvisas.gov.uk/en/howtoapply/infs/inf21pbsgeneral...
[3] - http://www.ukvisas.gov.uk/en/aboutus/newsroom/?view=News&...
Place I worked at during the late 90's had the UK immigration folks turn up and tell a US citizen on a tourist visa to get out of the country. He was working illegally on a tourist visa while he was waiting for his work visa to be approved. Suffice to say the work visa never got approved after that.
Totally worth it just for having such an adventure for a couple of years.