Presidential campaigns and the US telecommunications network have also been targeted by hackers in recent months.

Personal details of council staff and residents were put on the dark web after the ransomware attack.

The hack has left some hungry customers unable to make online orders.

Screenshots of data the attackers claim to have taken were published online on Thursday.

TfL says all online fares services have been reinstated, following a security incident in September.

Pat McFadden will tell a Nato conference that Russia could try to attack British businesses and power grids.

TfL said it can now process refunds for Oyster customers who have overpaid more whilst systems have been down.

Middlesbrough Council says no data from the authority or personal data was compromised.