Canary Wharf's office buildings are experiencing high vacancy rates as the district struggles to recover from the impact of the pandemic and the rise of remote working, with iconic buildings like One Canada Square currently 36% vacant compared to 4% before the pandemic. The increasing vacancy rates in Canary Wharf are attributed to a combination of factors, including the shift to flexible working, the preference for office buildings with better environmental credentials and amenities, and the demand for more flexible rental contracts. The area is also facing competition from other parts of London.