Special guests at this year's Air Guitar UK Championships include author Robert Rankin and comedians Andrew O'Neil and Tony Marrese. Tickets cost £12 and can be purchased on the door.
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The capital's theatres also generate more searches than those in any other city, according to research by Google.
Union officials are expected to meet next week to plan further stoppages if talks fail to resolve the dispute.
Natalie Sharp and Christine Bicknell appeared in court over an alleged incident at a Lidl superstore in Wallington, south London.