Law firm Olswang has signed up to the project and has a bee hive on its roof and another on a terrace in Holborn.

BBC: London offices offered bee hives to 'boost work morale'

It has appointed the lawyers Olswang to review whether News International has introduced the appropriate governance procedures and structures to prevent its staff using unacceptable practices to obtain information.

BBC: News Corp may face fit-and-proper test