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.

Hackers target the websites of organisations across the UK, including Portsmouth City Council.

The unitary authority says its website is down due to a cyber attack affecting several councils.

The school is targeted by criminals "intent on stealing information", it says.

Several Greater Manchester councils have confirmed their websites were impacted by a cyber attack.

TfL contacted about 5,000 customers saying their details may have been accessed in September's hack.

It is reported the Republican candidates' phones may have been among the targets of a broader cyber attack.