According to Prince, the group may be responsible for up to 80% of all spam that gets blocked.

CNN: Massive cyberattack hits Internet users

Matthew Prince, CEO of Internet security firm CloudFlare, estimates the group may be responsible for up to 80% of all spam that gets blocked.

CNN: Spain arrests suspect in massive cyberattack

The job will not be easy: three years ago, before inspectors were blocked, they had turned up the important bits of Iraq's nuclear weapons programme, destroyed most (not all) of its missiles, disposed of thousands of tonnes of chemical weapons and their ingredients, and they were closing in on its production of nerve agents and its best-kept biological secrets.

ECONOMIST: No peace in the Middle East without disarming Iraq

The system is supposed to be updated daily: as new pornographic sites spring up in cyberspace, their addresses will be logged in Riyadh and duly blocked.

ECONOMIST: Saudi Arabia

If Royal walked away, and an alternative tie-up with Carnival deal was then blocked by regulators, the company would be back to square one, probably leaving shareholders nursing hefty losses.

BBC: Valentine test for Princess tie-up

Pirate Party UK, a political group, has set up a proxy that can be used to reach the piracy site even though it has been blocked by the UK courts.

BBC: Music industry group BPI demands pirate proxy closure