Usually held early September moving between various venues across the UK.
British Science Association
Usually held mid-March.
British Science Association | National Science and Engineering Week
Latest Dates 8-15 March 2012. (The British Science Festival 2013 was in Newcastle: 7-12 September 2013.)
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'An annual display of the most exciting cutting-edge science and technology in the UK. It is open to members of the public and is free to attend ... During the exhibition there will be several evening Panel Discussions. Hear leading experts ... We will be hosting a Café Scientifique event on each day of the exhibition ... These events provide a forum for the debate and discussion of ideas, with audience participation being actively encouraged.' Usually held late June/early July.