GCHQ and its cyber-defence offshoot NCSC have both denied that they are investigating a cyber-attack on the London Stock Exchange, contrary to reports. The Wall Street Journal, normally a reliable source for news with a financial flavour, reported that British signals intelligence agency Government Communications Headquarters (GCHQ) has been looking into an August 2019 outage of the LSE, which was reported to the Financial Conduct Authority at the time.

Read full article on The Register