A faulty server halted trading of nearly 300 stocks at the London Stock Exchange (LSE) earlier this week.
A technical issue on just one of the servers impacted a 12th of London instruments at around 3pm on Monday and remained broken until the markets closed.
The LSE has confirmed the outage although is yet to publish a full report into its cause.
In its last statement released yesterday it said: "The issue is now understood and a detailed written description will be published tomorrow. The Exchange continues to work towards a full resolution of today's issues and expects the market to operate as normal tomorrow."
This is not the first time Europe's oldest exchange has suffered from technical problems.
Just last month, a problem in a market data feed suspended some trading and a year ago systems failure caused both the UK and South African markets to cease all trading for almost seven hours.
