It is not much to look at: a rectangle of rubble and some scrubby weeds, surrounded by the usual building services gear you would expect to find on the top of a modern office block.
Yet the roof of Barclays’ 31- storey global headquarters at Canary Wharf, in London’s docklands, sees a steady stream of visitors, from PhD students to property developers, all anxious to study the lessons of the bank’s “living roof”. At 160 metres above ground, it claims to be the highest of its type in Europe, perhaps the world.
