Window cleaners drop in on Shard press conference

Help

A news conference to mark the opening of the Shard was briefly interrupted by some surprise guests.

Architect Renzo Piano was speaking to journalists at the event on Wednesday when a group of window cleaners appeared alongside them on the 14th floor.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.