Cybercrime gang hits BA, Boots and BBC with ultimatum after mass hack

Russian-speaking Clop group demands ransom negotiations after stealing data of thousands of staff

• Explainer: Who is behind the attack and what happens next?

British Airways, Boots and the BBC have been hit with an ultimatum from the Russian-speaking cybercrime group Clop to begin ransom negotiations after it stole personal details of more than 100,000 staff across the organisations.

The demand, posted on Clop's darkweb site, commands the affected companies to email the group by 14 June, or face having their stolen data posted online, which it is feared includes names, addresses, national insurance numbers and bank details.