A European project

World Wide Web Consortium
Through host INRIA (and more so with ERCIM from 2003) directly part of European academic / research milieu
Has over 100 European members
ILRT, University of Bristol
HP Labs, Bristol
Stilo Technologies
Bristol has a concentration of Semantic Web development, and these three groups are strongly connected to Academia, Research, Industry and Open source developer communities.
A W3C office with strong connections to industry and research in the UK and throughout Europe.