English Heritage is lobbying hard to get the Heron Tower scheme called in by the Department for Environment, Transport and the Regions, disliking the impact on St Paul's Cathedral of the Kohn Pederson Fox-designed project, which would be the tallest in London. It has compiled a host of reasons why everyone from the City Corporation to CABE have got it all wrong. Curiously, there is no mention in this diatribe that EH's own London Advisory Committee recommended approval for the tower. Meanwhile if EH thinks the KPF tower is bad news, what will it think of another American intervention about to hit the headlines - a major tower on Bishopsgate, being designed by the king of Chicago, Helmut Jahn? You ain't seen nothing yet.