Another controlled explosion is taking place in the City of London following the delay to Foster and Partners' Swiss Re tower project - John Prescott has intervened to prevent the City granting planning permission, which it was about to do. The mipim City of London stand was buzzing with speculation over what might happen next, with policy and resources chief Judith Mayhew seen deep in conversation with various interested parties, including cabe chairman Stuart Lipton and chief planner Peter Rees. A letter has already been dispatched to Prescott stressing the importance of sorting this matter out; can anyone imagine Frankfurt getting into this sort of mess? The deputy prime minister may have acted to help the scheme rather than damage it, however, since an approval by the City would have triggered a legal challenge by the former owner of the tower site, the Baltic Exchange. Maybe Big John can bang heads together.