White elephant

When it arose, Canary Wharf was called a white elephant. But in 2012, it overtook the City of London as an employer of bankers & 120,000 people now work there.  New challenge: how to remain king of the jungle & adapt its fortress-like towers to the open, flexible workspace now in vogue?

Guessed the Word?          Series 51 (1/7)            pic: wikiImages