Lelia had managed to avoid security outside the Royal Society on Friday morning where Mandleson he was due to attend a co-called 'low-carbon' summit in London. After Leila threw the custard over him, Mandleson rushed inside the building dripping with green goo. About five minutes later he returned to face the media with some hastily prepared damage control 'wit'.

There is conflicting information on whether Mandelson had made a complaint or whether the police were obliged to investigate the incident without a formal complaint being made. Lelia said that the police had been told that they had to take action although Mandelson had apparently not made a formal complaint but some of the mainstream media reports suggested that Mandelson had now mad a complaint. Mandelson was also reported as saying he was surprised that his attacker "could just saunter off without being apprehended".