The Labour Representation Committee have also organised a rally in support of the RMT cleaners:

Rally in support of the RMT Cleaners Strike
8th July 6pm, The Grimond Room, Portcullis House, House of Commons.

RMT Tube cleaners working for private contractors on the London Underground are engaged in a campaign of industrial action for a living wage of at least £7.20 an hour. Come along and show your solidarity with the struggle of the Tube cleaners. Speakers include:

John McDonnell MP, Clara Osagiede (RMT Cleaning Grades Secretary), Joe Marino (BFAWU General Secretary), Glenroy Watson (RMT Finsbury Park), Andy Reed (ASLEF National Organiser), John Leach (RMT President), Matt Wrack (FBU General Secretary).

http://www.l-r-c.org.uk/news/events/cleaners_rally.pdf