"British Land has signed a total of 465,000 sq ft of new lettings at its recently completed London office developments since the announcement of its third quarter results in February, with an additional 154,000 sq ft under offer. Together the new lettings increase the Group's overall office occupancy rate from 84% to 92% and have a weighted average lease length of 15 years to first break. The terms agreed exceed the December 2009 estimated rental values (""ERV""), and add an additional £19 million of headline rent per annum to the Group. "