DESPITE continued grumbling about the London Stock Exchange's electronic trading system, chief executive Gavin Casey remains adamant that order-driven trading is integral to the exchange's on-going success in ''euroland.''

Speaking before last night's annual Stock Exchange dinner in Edinburgh, Casey highlighted the fact that every other major bourse in Europe had some form of order-driven trading before the UK finally introduced SETS in October 1997.

Recent reports have indicated that London's electronic system is losing market share and drawing harsh criticism from some leading fund managers. But Casey said that without SETS, the launch of the euro on January 4 would make it ''very difficult'' for the UK to deal with international equities.

Responses to a follow-up review of SETS should be published within the next couple of weeks, Casey said. A report from the Stock Exchange about any final adjustments should follow in about one month's time.

One of the main problems created by the new system is illiquidity at the opening and close of trading, which means investors executing transactions at these times run the risk of receiving unfavourable prices for their shares.

Illiquidity also creates the opportunity for rogue traders to unduly influence share prices with relatively small trades.

Casey said: ''We are likely to change a few things at opening and closing, to help with those issues.''

About half of all international equity trading in London is done in currencies that will be part of the euro bloc. The exchange's platform is already capable of trading in 36 currencies, so the shift to trading in euro-denominated securities and the ability to quote euro prices for UK stocks can be introduced when there is sufficient demand.

With such preparations in place and a review of euro-trading underway, Casey said he had no qualms about attracting listings from overseas companies in the future.

''London and Edinburgh stand out head and shoulders when it comes to investing in international equities,'' he said.

n This year's Greig Middleton Award for Best Scottish Company on the Official List has been given to Edinburgh-based Morrison Construction, while Midlothian-based Dobbies Garden Centres has been selected as Scotland's best AIM-listed company.