Norway shooter: Anders Behring Breivik listened to Clint Mansell during spree

Breivik said that he “loved” the piece, explaining that Lux Aeterna meant “eternal light” which he said was “an appropriate title”.

He went on: “I’ve listened to this track several hundred times and I never seem to get tired of it.

“The track is very inspiring and invokes a type of passionate rage within you. In Lord of the Rings – a good version of this track (Requiem for a Tower version which I think is the best) is performed during the most intense fighting of one of the central battles. Since it has worked for me, it is likely that it will work for you. An invigorating piece of art.”

The 32-year-old has spent a lot of time in London and is believed to have written the manifesto of Right-wing ranting in the capital.

In it, he references other favoured aspects of British culture including Jeremy Clarkson and the BBC’s Top Gear, which he described as “one of the funniest shows on TV”.

Under a section headed “The ideological journey – from indoctrinated multiculturalist zealot to Conservative Revolutionary” he lists an episode of Channel 4 documentary series Dispatches, called Undercover Mosque, under “Further studies”.

He also quotes Mark Steyn, a Canadian writer and right wing columnist, who referenced the July 7 bombers in his book America Alone: The End of the World as we Know it.

Steyn wrote: “When lifelong Torontonians are hot for decapitation, when Yorkshiremen born and bred and into fish ‘n’ chips and cricket and lousy English pop music self-detonate on the London Tube, it would seem that the phenomenon of “re-primitivised man” has been successfully exported around the planet.”