In a home video Mohammed Sidique Khan, 30, from Dewsbury, tells the seven-month-old to learn to fight because "fighting is good".

The existence of the chilling footage was revealed at Kingston Crown Court in the trial of three men accused of helping to plan the 2005 attacks on London which killed 52 people.

It was not shown in court, but the jury was told Khan and his wife Hasina were both present and she says: "There are two minutes left so say your piece."

The bomber replies: "Maryam my little sweetheart, I love you lots and lots. You are my little baby with big fat little feet.

"Look after your mother, she needs looking after. Maryam be strong, learn to fight – fighting is good. Be mummy's best friend. Take care of mummy – you can both do things together like fighting and stuff."

The jury was shown other footage of Khan saying goodbye to his daughter.

Shot while he is sitting on a bed at his wife's family home, it includes the Edgware Road bomber cradling his daughter and softly telling her what he is doing is "for the sake of Islam".

It was made two days before Khan flew to Pakistan in November 2004 and the jury were told it was a "farewell" before he left to "fight jihad".

In fact, there was a "change of plan" during the trip and Khan returned to the UK, where he masterminded the July 7 attacks.

The farewell message which was recorded on November 16, 2004, shows Khan holding his daughter and gently kissing her head.

He says: "Sweetheart, not long to go now. And I'm going to really, really miss you a lot. I'm thinking about it already. Look, I absolutely love you to bits and you have been the happiest thing in my life. You and your mum, absolutely brilliant.

"I don't know what else to say. I just wish I could have been part of your life, especially these growing up – these next months, they're really special with you learning to walk and things.

"I just so much wanted to be with you but I have to do this thing for our future and it will be for the best, inshallah, in the long run. That's the most important thing.

"You've got loads of people to look after you and keep an eye on you. But most importantly I entrust you to Allah and let Allah take care of you. And I am doing what I'm doing for the sake of Islam, not, you know, it's not for materialistic or worldly benefits."

Neil Flewitt QC, prosecuting, told the jury it was clear from the video that Khan did not expect to see his daughter again.

He said: "Put bluntly, he knew that he was going to his death."

The video was among a number of items which Khan's wife Hasina Patel gave to a friend, Faiza Rehman, who in turn handed them to the police in the aftermath of the July bombings.

Extracts from Mrs Patel's 2004 diary were also read out to the jury. These included one for November 26 that read "S rang, good news, back by Feb." The entry for February 8, 2005, then stated "Sidique back!"

Waheed Ali, 24, of Tower Hamlets, east London, is standing trial with two other men, Mohammed Shakil, 31, and Sadeer Saleem, 27, both from Beeston, Leeds, accused of conspiring with Khan, Shezhad Tanweer, Hasib Hussain and Jermaine Lindsay to cause explosions between November 17, 2004, and July 8, 2005.

All three are alleged to have carried out a two-day reconnaissance mission in the capital on December 16 and 17, 2004, with Hussain, of Holbeck, Leeds and Lindsay, from Buckinghamshire, and visited the Natural History Museum, the London Eye and the London Aquarium. They deny all charges.

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