UPDATE: LSE resumes trade after technical glitch

Trading in London was restarted at 12.15 after being suspended this morning following ‘technical glitches' on the LSE, the exchange says.

The LSE halted its SETS and SETSqx services as it investigated the problem, and says "uncrossing trades that took place in the opening auction are under investigation for possible cancellation".

Updates can be found on the exchange's website, it says.

The LSE moved its main market trading to the MillenniumIT system earlier this month.

The Financial Times spoke to traders who said the opening auction had taken place but there was a problem with market data.

Last week's LSE data problem centred on the data feeds that the LSE provides to distributors such as Thomson Reuters, Bloomberg, Interactive Data and Telekurs, which then display prices to traders on screens, data vendors told the FT.

It was unclear which side was to blame for the issue, which has caused "zero" to appear on screens momentarily instead of bid-ask prices used by traders to make trading decisions, they said.

Additional reporting: ShareCast