Gavin Finch Bloomberg

British industrialist Sanjeev Gupta's companies seemed to be prospering until his main lender Greensill Capital imploded last month. But before it collapsed, several banks cut off the commodity trading business of Mr Gupta's Liberty House Group.

The 23-year-old who saved the world from a devastating cyberattack in May was asleep in his bed in the English seaside town of Ilfracombe after a night of partying when another online extortion campaign spread across the globe.

Britain crashing out of the European single market could cost banks and associated businesses in the U.K. almost 40 billion pounds ($51 billion) in lost revenue, undermining a key sector of the economy, an industry report warned on Tuesday.

British industrialist Sanjeev Gupta's companies seemed to be prospering until his main lender Greensill Capital imploded last month. But before it collapsed, several banks cut off the commodity trading business of Mr Gupta's Liberty House Group.

The 23-year-old who saved the world from a devastating cyberattack in May was asleep in his bed in the English seaside town of Ilfracombe after a night of partying when another online extortion campaign spread across the globe.

Britain crashing out of the European single market could cost banks and associated businesses in the U.K. almost 40 billion pounds ($51 billion) in lost revenue, undermining a key sector of the economy, an industry report warned on Tuesday.