Shares in battered Internet security firm, Baltimore, lost further ground on the London Stock Exchange yesterday.

The stock, which only joined the FTSE 100 index last Monday, closed at £81.13, down 2.5 per cent on the day and some 46 per cent below last month's peak of £150.

On the Nasdaq, it lost $11.50 or just over 8 per cent to close at $131.50.