All of us have been shocked and saddened by the horror and tragedy of the Grenfell Tower fire in London last week. As I write at the weekend following the fire, many facts remain unknown and it is absolutely right that a full public inquiry will take place to leave no stone unturned in establishing the facts. While lessens need to be learnt, it is already clear that something, or more likely a terrible and deadly combination of several things, went badly wrong. There is potential for criminal charges so I will refrain from speculating as to the causes and why the fire spread so quickly in a way that building designs and safety regulations should never have allowed possible.