Two more Isis brides from Britain held with their young children in squalid Syrian detention camps are believed to have been stripped of their citizenship amid a growing political row over the death of Shamima Begum’s three-week-old baby.

Legal sources say that Reema Iqbal and her sister, Zara, who between them have five boys under the age of eight, have had their UK nationality removed after marrying into a terror cell linked to the execution of western hostages.

The revelation will fuel concerns about the fate of innocent British children, so-called “cubs of the caliphate”, who have been left stranded in Syria as Isis faces military defeat.

Today Sajid Javid, the home secretary, came under fire from both Labour and Conservative MPs for stripping Begum,