Under the legislation going before Parliament on Thursday, MI5, the police, the National Crime Agency and other agencies that use informants or undercover agents will be able to explicitly authorise them to commit a specific crime as part of an operation.

The law will require MI5 officers and others to show the crime is "necessary and proportionate".

Security officials will not say which crimes they will consider authorising because that could lead to terrorists and other serious criminals working out who is working undercover.

But the legislation stresses agencies must not breach the Human Rights Act, which requires the government to protect life.

While the security service's watchdog, a senior judge, will report on how the power is used, there will be no role for the Crown Prosecution Service in reviewing the crimes.

Rangzieb Ahmed, convicted in Manchester yesterday of directing terrorist activities, was today sentenced to life in prison with a minimum term of 10 years.

Lawyers representing Ahmed are to launch an appeal and embark on a civil action, alleging he was tortured by Pakistani intelligence agents before being questioned by officials from the British MI5 security service.

Like other British terrorism suspects detained in Pakistan, Ahmed says he suffered brutal mistreatment at the hands of the country's notorious Inter-Services Intelligence (ISI) agency shortly before being questioned by two MI5 officers.

The Manchester jury that convicted him of being a member of al-Qaida and of directing a terrorist organisation yesterday was not told that three of the fingernails of his left hand had been removed.

警察によると、逮捕されたカイリ・サアダラ容疑者（25）はレディング在住で、単独犯と見られている。事件は現在、テロ事件として捜査されている。

捜査筋によると、容疑者はもともとリビア出身で、2019年にMI5に認識されるようになったという。

捜査を担当する南東部対テロ警察（CTSPE）は、20日に殺人容疑で逮捕されたレディング在住の25歳男性を、2000年対テロ法41条違反の疑いで再逮捕したと発表した。
BBCのドミニク・カシアーニ内政担当編集委員が取材したところ、治安当局が最初に容疑者に注目したのは、テロ目的で海外渡航を意図しているという情報を得たことがきっかけだった。MI5が捜査に着手したが、当時は具体的な脅威につながる内容は見つからなかったという。捜査継続のための事件ファイルも作成されなかった。