Things are not looking so good for London on the malware front, with the city being the zombie capital of the world. This means that there are more machines acting as bots in London than in any other city in the world. Symantec reckons that something in the region of 150,000 PCs are secretly controlled by hackers in London.

Things are bad in general for the UK on this front, with the nation being officially the worst bot-infected place on the globe. This is particularly accountable by the massive spread of broadband in this country. The city of Winsford in Cheshire is the world's second biggest hotspot for zombies, followed by Seoul in Korea.

"Bot networks are valuable for a couple of reasons: One, because they allow for extremely rapid propagation, and two, because they provide a relatively high level of anonymity for providing attacks," Dean Turner, senior manager of the Symantec Security Response team said.