The activists were from environmental group Reclaim the Power. The group occupied the lobby of Media Zoo offices in Imperial Wharf with a banner reading: "Fracking is shit. You can’t polish a turd."
Media Zoo represents chemicals company Ineos, which has recently acquired 729 sq miles of fracking licences. The PR agency managed media relations for Ineos during an industrial dispute last year over cost cuts in order to keep open its Grangemouth refinery in Scotland.
A spokesperson from Media Zoo said seven demonstrators "forced their way" into the reception. The spokesperson said police were called immediately and arrests were made. PRWeek called the local police to confirm that arrests had taken place, but received no reply at the time of publication.
"Media Zoo continued business as usual," the agency stated.
Meanwhile, Edelman was prepared for a similar demonstration to take place at its office near Victoria in connection with its work for the Task Force on Shale, an independent body funded by oil and gas companies including Centrica, Total and Cuadrilla Resources.
Instead two activists came into the office and filmed a video simulating a woman giving birth to highlight the alleged link between fracking and birth defects.
Video credit:@indyrikki - clearbluefilms
The demonstration was part of a wider movement, with 18 individual actions taken across London and a total of 11 arrests made. Targets included the Department of Energy and Climate Change, Energy UK and RWE npower offices.
Clare Jones from Reclaim the Power said: "The public has a right to be informed about the real dangers of nuclear – from cancer to contamination to climate change. For the cost of building one nuclear power station you could build more than 1,000 offshore wind turbines."
In a statement, Edelman defended its client, saying: "The Task Force for Shale Gas was established in September 2014 and aims to provide a transparent, trusted, independent and impartial platform for public scrutiny, discussion and information about shale gas exploration and production in the UK. The Task Force acts with total impartiality and independence from its funders, and from stakeholders with firmly supportive or firmly opposed views on issues.
"The Task Force has always been open and transparent about Edelman UK’s involvement in providing the secretariat function."