Misc: Who was Big Ben named after?

Questions

Which element has exactly the same name as a planet?

What nationality is the speedway rider Ole Olson?

Which county are you in if you are On Ilkley Moor bah't 'at?

Who are the only band to have made a debut appearance as bill toppers in front of 120000 people in Hyde Park?

Who gave a 1.25 million charity cheque to Bob Geldof in Oct 1986 that he couldnt have given to him 3 months later?