The construction programme was confirmed in upbeat results for the year to March 31 released today.

Chairman Chris Gibson-Smith said: “During the year we started a number of projects to create what is currently central London’s largest committed office development programme.

“We recognised, early on, the opportunity provided by a new major office cycle in Central London and will deliver 2.2 million sq ft of high quality space, between 2012 and 2014, into a constrained market with rising rents and capital values.

“An investment of £1.6 billion, of which our share totals £1.1 billion, spans six separate sites including a 700,000 sq ft building for UBS at Broadgate, the 610,000 sq ft Leadenhall Building in London’s insurance district and the 500,000 sq ft NEQ building, completing our Regent’s Place estate.”