UK Commission for Employment and Skills is collaborating with the likes of Sony and Ubisoft on the project - which has is kicking off with a £6.5m government grant, too.
An existing datacentre in the London Docklands area is being expanded in a project set to cost £135m.
£10m worth of funding has been put aside by the government to facilitate the trials, with interested cities needing to apply by October.
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