It's hardly surprising, really: having replaced the peer-to-peer Skype with a client-to-cloud version, Microsoft's now shuttering the London development office it inherited when it bought the VoIP application.

First reported by the Financial Times, the decision to unify some engineering positions also affects Yammer developers in the office.

The FT says the decision will mean 400 staff will be laid off.

For a while after its acquisition by Microsoft, Skype's Holborn office demonstrated its independence.

Microsoft now says what positions remain in the UK will be moved to the company's offices in Paddington.

Redmond has been slowly re-crafting the once-P2P Skype in its own image as a cloud-based enterprise communications application which it hopes can be turned into a Slack-killer.

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