Water regulator Ofwat says it will challenge a request to raise water bills in the capital by 8% next year.
The request by Thames Water could see the average annual bill rise by nearly £30 if it goes ahead.
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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.