Wolfson Microelectronics sank six per cent in early trading, followed closely by stove maker Aga, which fell 5.42 per cent.
Engineering firm Wood Group declined 4.82 per cent, while investment manager Man Group dropped 4.8 per cent.
Media companies Centaur fell 3.45 per cent and Mecom Group sank almost three per cent. Yesterday, publisher Centaur said the outlook for business publishing remained uncertain.
Huntsworth, which provides public relations and healthcare communications, fell almost three per cent as it reported a 17.2 per cent slump in revenues from its financial PR division Citigate.
Topping the leader board this morning was construction firm Keller Group, which this morning said full-year profit would be above expectations. It added almost 13 per cent in early trading.
Credit card insurer CPP Group rose more than 11 per cent. This morning it said it would pay £33.4m in penalties following a probe by the Financial Services Authority.
WS Atkins was up 8.31 per cent as investors reacted positively to the news that pre-tax profit over the half year was up by 14 per cent.
Elsewhere, home shopping group Findel was up 7.46 per cent and property group Savills jumped 4.53 per cent.
UK banking shares were mostly in positive territory this morning. HSBC was up 0.07 per cent, RBS jumped 0.94 per cent, Barclays rose 0.67 per cent while Lloyds Banking Group sank 2.4 per cent.
In Asia, the Nikkei closed up 1.9 per cent, while in the US the Dow Jones closed down 1.45 per cent.