London Stock Exchange group, Europe's oldest independent exchange, said attempts to fix its biggest computer failure in more than eight years is "taking longer than expected.''
The fault, which started at about 9 am GMT on Monday, has left some traders without prices and unable to buy or sell shares for about six hours. The exchange was still trying to re-connect customers at 2:20 pm, according to the LSE's web site. It didn't say when the trading would restart and spokesmen for the LSE weren't immediately available to elaborate.