Guardian: What do the Westfield shopping centre, Canary Wharf and a Victorian museum have in common? They are all at the vanguard of a move to encourage biodiversity in buildings that could take on an unprecedented scale if guidelines published today are adopted. Under recommendations from the UK Green Building Council (UKGBC) for developers, planners and policy-makers, Otters could return to urban rivers, bats could roost under bridges, swifts could flock to office blocks and peregrine falcons …