Is it true that MI5 offered a job to the killer of a British soldier?

Is it true that MI5 offered a job to the killer of a British soldier?

Since the day when Dr David Kelly was found dead in a wooden area, the fact the MI5 knew the identity of those who carried out the attacks of July 7^th 2005, going through the times when Alexander Litvinenko was poisoned, over the time when Boris Lugovoi was found dead – initially thought to have committed suicide – there have been serious doubts about the integrity of the British Security Services.

If what we are now told happens to be true, it would be yet another scandal affecting the integrity of the British Security Services. It transpires that MI5 knew the Nigerian attackers of a British soldier and – not only that – MI5 offered one of the men who killed a British soldier a job in MI5.

We know that the government of Nigeria is making strenuous efforts to get rid of AlQaeda guerrillas and at present is involved in a military campaign to eradicate Islamic extremists. How on Earth could MI5 offer a job to a Nigerian Muslim convert?