Scotland Yard examining '7/7 widow' belongings

Detectives in Nairobi and London are trying to establish if this passport has been used by Samantha Lewthwaite. Credit: ITV News contacts

Scotland Yard officers are examining a diary thought to belong to a British woman wanted for questioning by anti-terrorism officers in Kenya. It is part of a stash of personal belongings, including books and clothing, taken to the UK for forensic examination, ITV News has been told.

Detectives in Nairobi and London are trying to establish whether the missing Briton is Samantha Lewthwaite, the widow of 7/7 bomber Jermaine Lindsay.

Officially they will only say that the wanted Briton is using the name "as an alias".

Ammunition and bomb-making equipment were found when anti-terror police raided her five-bedroom villa. The officers had been looking for another person, thought to be an associate of the British woman.

ITV News has been told that investigators seized a British birth certificate at the home. The name on it does not match that on the woman's South African passport, Natalie Faye Webb, according to a police source.

Officers now want to question the woman as part of an investigation into the financing of an al-Shabaab cell. They have released an image of her, taken by an undercover police officer.

One alleged cell member, Jermaine Grant, from east London, was arrested nearby in Mombasa and has been charged with possessing materials with the intent to create a bomb.

Jermaine Grant, a British citizen, sits inside the dock at the Mombasa Law court in the Kenyan coastal city of Mombasa, January 12 2012. Credit: EUTERS/Joseph Okanga