Mirror : THE U.S. CONNECTION -- EXCLUSIVE: Chiefs mourn loss of 'genius'

THE U.S. CONNECTION -- EXCLUSIVE: Chiefs mourn loss of 'genius'

By Jon Clements | August 27, 2010

The full extent of murdered spy Gareth Williams' role in the world of espionage slowly began to emerge last night.

He was rated as one of the best codebreakers in the business - an elite agent who fought in secret to thwart al-Qaeda terror attacks at home and abroad.

And the 31-year-old maths genius's unique skills were also recognised by spy chiefs across the Atlantic.

Despite a dislike of flying, he regularly travelled from London to Baltimore to meet US National Security Agency officials at their Fort Meade HQ - dubbed the Puzzle Palace.

He made the trip up to four times a year "on business" for the Government's GCHQ listening post.

Last night his uncle told how he would mysteriously disappear for up to three or four weeks at a time.

Speaking at his farmhouse at Anglesey, North Wales, Michael Hughes said: "The trips were very hush-hush. They were so secret that I only recently found out about them - and we're a very close family. It had become part of his job in the past few years. His last trip out there was a few weeks ago, but he was regularly back and forth."

Mr Williams' mysterious death has shocked and dismayed officials at the NSA, which has an agreement with GCHQ to pool their signal intelligence - known as SigInt.

Fort Meade officials have been updated on the police investigation into how the keen cyclist, who was on attachment to MI6, was found dead in a sports holdall in his bathtub.

They are anxious to know if there has been any breach of global security as a result of the murder at Mr Williams' Government-owned flat in Pimlico, Central London.

Britain now relies heavily on the NSA to help monitor phone calls, emails, texts and other communications of UK terror suspects.

When MI5 discovered the plot in 2006 by British Muslims to bomb transatlantic jets, GCHQ called in the NSA to help - and Williams worked closely alongside them.

Spy satellites tracked and secretly copied emails from mastermind Rashid Rauf in Pakistan to the two ringleaders in Walthamstow, East London. The messages were vital to the 2008 convictions of Abdullah Ahmed Ali, Assad Sarwar and Tanvir Hussain.

Mr Williams, who won a first class honours degree in maths at just 17, used to spend an average 19 days on each US trip before taking a fortnight's holiday.

One Western intelligence source told the Mirror: "He will have had crucial high-level meetings with American intelligence officers. His job would have been crucial to the security of the UK and our interests abroad - and also to America and Europe.

"Although not particularly high up the GCHQ ladder, the importance of his role should not be underestimated. The man was a mathematical genius."

It is thought Mr Williams may have had input into the monitoring of communications between Taliban commanders in Afghanistan - and even the tracking of serious organised crime suspects.

His death is being seen as a major blow to the security services because of his unusual and rare talents. A spokesman for Bangor University, where he completed his degree in just two years, described the fitness fanatic as "extremely gifted".

And a former classmate at Uwchradd Bodedern secondary in Anglesey said: "Nobody ever needed a calculator when Gareth was around."

Police investigating his death continue to focus on his personal life as they try to establish a motive.

Relatives are baffled by claims his body lay undiscovered for up to two weeks as his sister Ceri, from Chester, says she spoke to him last Wednesday.