Uniq is leading the food sector producer sector lower. The company, whose customers include Marks & Spencer, posted a pre-tax loss of £18.5m for the year, compared with £100,000 the previous year, on revenues that edged up to £287.2m from £286.7m.But what has really concerned investors is a proposal to link pension scheme contributions to profitability as it seeks to deal with a ballooning deficit.After better than expected results from US investment bank JP Morgan yesterday investors are keen on UK banks such as Barclays, Royal Bank of Scotland and HSBC Holdings but Lloyds Banking, which lacks the exposure to investment banking that the others boast, is barely changed.Top performing sectors so far todayFixed Line Telecommunications 1,956.02 +1.53%Banks 5,292.64 +1.48%Health Care Equipment & Services 3,800.33 +1.40%Mobile Telecommunications 3,524.56 +1.27%Electronic & Electrical Equipment 1,842.18 +0.71%Bottom performing sectors so far todayTobacco 26,295.90 -1.44%Food Producers & Processors 5,035.71 -1.07%Mining 24,612.30 -1.07%Household Goods & Home Construction 6,770.76 -0.86%Beverages 8,648.79 -0.67%