The British Muslim convert known as the ‘White Widow’ has joined ISIS and is training a female suicide bomber squad in Syria, it has been reported.

Samantha Lewthwaite, 30, from Aylesbury in Buckinghamshire has spent the past two and a half years on the run and has been repeatedly linked to terrorist plots in East Africa.

The mother-of-four – who is the widow of one of the 7/7 suicide bombers – is charged with plotting a bombing campaign across Kenya in 2011.