London Fire & Emergency Planning Authority
8 Albert Embankment
London, SE1 7SD

telephone: 020 7587 2000 (switchboard)
email: info@london-fire.gov.uk

These people may be able to direct you, Smiler. Maybe if you can get the name of the cinema that burned it will make searching easier. Also, some of the London 'catters may remember. Good luck with it.