Google is yet to start building its new UK headquarters in King’s Cross, Techworld can reveal.

The Silicon Valley internet giant was expected to move into the £650 million building in 2017 but Camden Council today said building work has still not started.

“As yet no works on the building have commenced,” a Camden Council spokesman said.

Google told Techworld that the King's Cross project has been put on hold because the company as a whole is reviewing how it wants its buildings around the world to look from the exterior. 

As a result of this review process, Google said that it no longer has a target completion date for the King's Cross project. 

Google was initially planning to relocate staff in Victoria and Holborn into the new building behind Kings Cross railway station in late 2016. 

The office, expected to be able to accommodate up to 5,000 Googlers, was approved by Camden Council last September as part of a 67-acre redevelopment of the area around King's Cross station.

However, last November, the company said the building would not be ready until at least 2017. At the time, Google said it was seeking more ambitious designs than those put forward by lead architect AHMM, even though they featured a running track and a swimming pool on the roof.