Plans by UBS to build a new headquarters in the City of London’s Broadgate estate could be under threat from English Heritage, which is considering a historic listing for parts of the 25-year-old Arup-designed office campus.

The conservation group is considering recommending a Grade II* listing of the buildings, owned by British Land and Blackstone, that would have to be demolished to make space for the 700,000 sq ft UBS development.