For the last two years Apple has been tight-lipped about its office in Cambridge, but now it seems the iPhone maker is ready to come out of the closet.

The tech giant has repeatedly refused to confirm it is operating out of 90 Hills Road, next to the entrance of the Botanic Gardens. But now its iconic logo has appeared on signage outside the building,

In November 2015 the News exclusively revealed that Apple was hiring staff in Cambridge to work on its Siri personal assistant software, following its $100m acquisition of Cambridge University spin-out VocalIQ, which was using artificial intelligence to develop a system that would allow humans and computers to communicate using natural language.

It is thought more than 30 people, including former VocalIQ staff, are now working at the Hills Road office, developing new versions of Siri to compete with the likes of Amazon and Google, both of which are marketing their own AI-powered personal assistants.