On Tuesday, 24 November, detectives from the Metropolitan Police Service's Cyber Crime Unit (MPCCU) and officers from Southern Wales Regional Organised Crime Unit executed a search warrant at an address in Llanelli, Wales.

The 18-year-old boy [E] was arrested at the address on suspicion of blackmail and taken into custody at a Dyfed Powys police station.

Detectives continue to investigative. Four other people have been arrested in connection with the investigation.

On Monday, 26 October, a 15-year-old boy [A] from County Antrim, Northern Ireland, was arrested, by officers from the Police Service of Northern Ireland (PSNI), working with detectives from the MPCCU on suspicion of Computer Misuse Act offences.

He was taken into custody at a County Antrim police station and has since been bailed to return pending further enquiries.

On Thursday, 29 October, a 16-year-old boy [B] was arrested at an address in Feltham on suspicion of Computer Misuse Act offences. He is currently on bail until a date in mid-March 2016 pending further enquires.

On Saturday, 31 October, detectives arrested a 20-year-old man [C] at an address in Staffordshire on suspicion of Computer Misuse Act offences. He is currently on bail until a date in early March 2016 pending further enquires.

On Tuesday, 3 November, a 16-year-old boy [D] was arrested at an address in Norwich on suspicion of Computer Misuse Act offences. He is currently on bail until a date in late March 2016 pending further enquires.

Anyone who believes they have been directly affected by this alleged data theft should visit http://help2.talktalk.co.uk/oct22incident

Further crime prevention advice concerning this incident can be obtained from the Action Fraud website http://www.actionfraud.police.uk/news/talk-talk-hacked-by-cybercriminals-what-to-do-if-you-have-been-affected-oct15

Further advice on staying safe online and protecting your identify can be obtained from Get Safe Online via www.getsafeonline.org.