On the news it has just reported that a Doctor (26 year old Jordanian junior doctor) and his wife have been taken into custody over the bomb attempts. Also, one of the men in the Glasgow vehicle was alo seen in the mercedes in London (presumably on CCTV examination after the car was found)- so London and Glasgow are definitely connected.
If the Doctor does turn out to be involved, it is so strange- on the one hand to train to be a doctor, to help people, and on the other, to be planning a massacre.