London open: Weak start from FTSE 100

London's leading share index has fallen into the red in early dealings after a mixed reception for company updates.Brewer SABMiller and property group Land Securities are among the fallers.Peroni and Grolsh brewer SABMiller saw lager volumes dip slightly in the first nine months of its current year with the US in particular under pressure. Land Securities continued to perform well in the third quarter and plans to spend £655m on development projects in London this year. Retail updates were well received by the market.Luxury fashion label Burberry is higher after saying it expects profits for the full year to be at the top end of expectations after seeing strong sales in the last three months of 2009.FTSE 250-listed Carphone Warehouse moves up after saying it expects its full year earnings to be at the top end of expectations after seeing strong trading at both its divisions in the third quarter.Cadbury is the best performer in the FTSE 100. The board of the chocolate maker is close to recommending a takeover from US firm Kraft after a bitter battle for control.Pearson slips back despite the FT publisher raising its forecasts for 2009 for the second time in three months after strong growth in US higher education and a better than expected result from the FT. Water company Severn Trent has announced a 'one-off' cut in the dividend to help it meet the output and operating efficiency demands of the industry regulator.Back in the FTSE 250, strong demand for military equipment driven by continued conflict in Afghanistan helped the military decoy specialist Chemring post a jump in sales and profits in the year to October 31. Pre-tax profits climbed to £95.8m from £57.7m. Sales climbed to £503.9m from £354.2m.Spread bet firm IG Group upped its interim dividend by 25% after another record first half for sales and profits as bad debts fell sharply. Trading revenue in the six months to 30 November 2009 rose 14% to £143.8m, (10% on a constant currency basis), while adjusted profit before tax was £78.0m, up 34%. Pre-tax profits were 26% higher at £69m.FTSE 100 - RisersCadbury (CBRY) 834.50p +3.34%Burberry Group (BRBY) 617.50p +3.00%Severn Trent (SVT) 1,115.00p +2.39%Shire Plc (SHP) 1,233.00p +0.74%Rexam (REX) 295.30p +0.72%Vodafone Group (VOD) 136.15p +0.41%United Utilities Group (UU.) 492.70p +0.37%Associated British Foods (ABF) 871.00p +0.23%Cable & Wireless (CW.) 145.60p +0.21%RSA Insurance Group (RSA) 127.40p -0.00%FTSE 100 - FallersSABMiller (SAB) 1,768.00p -2.86%International Power (IPR) 304.20p -2.19%Barclays (BARC) 310.80p -2.19%Invensys (ISYS) 305.30p -1.83%WPP Group (WPP) 596.00p -1.49%Intertek Group (ITRK) 1,223.00p -1.45%HSBC Holdings (HSBA) 689.50p -1.36%Standard Chartered (STAN) 1,540.00p -1.35%Land Securities Group (LAND) 684.00p -1.30%Thomas Cook Group (TCG) 241.30p -1.27%FTSE 250 - RisersMelrose Resources (MRS) 353.00p +4.78%Northern Foods (NFDS) 67.50p +3.05%St. Modwen Properties (SMP) 212.20p +3.01%Carphone Warehouse Group (CPW) 201.20p +2.13%Carpetright (CPR) 951.50p +1.93%AG Barr (BAG) 900.00p +1.93%Computacenter (CCC) 309.40p +1.44%Domino's Pizza UK & IRL (DOM) 325.40p +1.21%Northumbrian Water Group (NWG) 274.10p +1.11%Big Yellow Group (BYG) 344.90p +1.08%FTSE 250 - FallersGem Diamonds (GEMD) 240.10p -2.79%Filtrona PLC (FLTR) 188.30p -2.38%Heritage Oil (HOIL) 540.00p -2.17%DS Smith (SMDS) 122.10p -1.61%Murray International Trust (MYI) 789.50p -1.56%Weir Group (WEIR) 792.00p -1.55%ITV (ITV) 57.20p -1.55%Cookson Group (CKSN) 462.70p -1.51%Hochschild Mining (HOC) 324.10p -1.49%Lamprell (LAM) 204.00p -1.45%