The trial of six men accused of planning a wave of suicide bombings heard this week how detectives found recorded speeches by Osama Bin Laden at a bomb factory' in New Southgate.

Police recovered a variety of anti-Western paraphernalia at Enfield Council-owned Curtis House, in Ladderswood Way, the home of one of the accused, Yassin Omar. The prosecution says it was there that bombs were manufactured for planned coordinated attacks on London's transport system on July 21, 2005.

The jury was told that during a ten-day search of the flat, from July 25 to August 3, police found images of beheadings of Western hostages; newspaper and television reports about the July 7 bombings in London in which 52 people died; and videos of Osama Bin Laden and Abu Musab al-Zarqawi, the head of al-Qaeda in Iraq who was killed last June.

Woolwich Crown Court heard detectives also found an audio cassette of jailed preacher Abu Hamza praising suicide bombings called Join in the Victorious Party.

Nigel Sweeney QC, prosecuting, said: "Join the Victorious Party was a sermon by Abu Hamza, in the course of which he suggests that suicide bombing should not be seen as suicide but rather as martyrdom."

A CD-Rom found at the flat entitled The 19 Martyrs is the last will/message of those who attacked America on 9/11', the court heard. Also at the flat was footage of Russian soldiers being deliberately run over and killed in Chechnya, the prosecution says.

Last week, the jury also heard from people travelling on a London Underground train when Omar allegedly attempted to blow himself up.

Passengers described the moment Omar's bomb failed to go off.

One witness, Marcelle Jermid, said: "He was surprised. It was as if he didn't expect his legs to be there at the time."

Another person on the same northbound Victoria Line train, Hector Manuel Huerta, said: "I had a clear view. His bag exploded. It was pretty loud. I saw the person carrying the rucksack shouting and in pain."

Omar, 26, denies conspiracy to murder and conspiracy to cause explosions likely to endanger life.

Also denying the charges are co-defendants Hussain Osman, 28, of Blair House, Stockwell Road, Stockwell; Ramzi Mohammed, 25, of Dalgarno Gardens, Peabody Estate, North Kensington; Adel Yahya, 24, of High Road, Tottenham; Mutkar Said Ibrahim, 28, of Farleigh Road, Stoke Newington; and Manfo Kwaku Asiedu, 33, of Finsbury Park.

The trial continues.