<sod >After confusion about which member of the now identified 12-member Isis terror cell drove the van in the attack, Catalan authorities confirmed this morning that their working theory is that it was Mr Abouyaaquoub.< eod>< sod > After confusion about which member of the now identified 12-member Isis terror cell drove the van in the attack, Catalan authorities confirmed this morning that their working theory is that it was Mr AbouyaaquoubÂ who hijacked the vehicle and drove it to the popular tourist street.< eod>