Trading in the biggest shares listed on the London Stock Exchange has been delayed for more than an hour because of a technical problem.
Shares in the FTSE 100 and FTSE 250 indices were affected by the issue, although smaller stocks were trading.
The LSE said it was investigating a “potential trading services issue”, and an update was due at 09:15.
The last time the market failed to open on time at 08:00 was in June 2018, when it was delayed by an hour.
On Thursday, the FTSE 100 index had fallen to a six-month low on concerns about the impact of the trade war between China and the US on the global economy.
It closed 1.1% lower at 7,067.01.