London Mayor Boris Johnson has urged larger firms in the capital to pay the London Living Wage of £8.55 to their employees, saying "it doesn't hurt these companies to do a bit more for their employees".
Speaking in a BBC interview after his speech at the Conservative Party Conference, he said there was no reason why large companies should avoid paying the higher rate. "They've got huge dividends, huge profits and it can make a real difference to people on low incomes in London", he said.
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Ahead of tonight's planned strike, London Underground have offered new payments and terms to staff to avert the strike.
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.