Financial traders were unable to buy and sell shares as the London Stock Exchange failed to open on time
The London Stock Exchange failed to open at its usual time of 08.00 thanks to a technical issue.
LSE said it was investigating a "potential trading services issue" but was not more specific than this.
Buyers and sellers of UK company shares on indices such as the FTSE100 and FTSE 250 were unable to trade British-listed companies between 08:00 and around 09.45 as a result.
However, trading of FTSE 350 and AIM shares appeared unaffected.
The FTSE 100 closed at a six-month low last night of 7,067.01 points. Other European markets have rallied this morning however, but the UK's stock exchange was initially unable to participate.
The exchange was down for over an hour, a highly unusual event. The last time LSE failed to open on time was in June 2018 when it opened an hour late due to a technical issue.
It is the longest outage of the stock exchange since 2011, when markets were shut until lunchtime.
As of 09.45 both the FTSE 100 and FTSE 250 appeared to be trading again as normal. An explanation from LSE as to what happened is yet to emerge.