Aggreko was the biggest riser on Monday after the temporary power and temperature control group said it now expects full-year results to be slightly higher than previous expectations. Analysts at Investec said investors "should be able to sleep slightly easier tonight" after a "welcome" trading update.CRH rallied after Deutsche Bank reiterated its 'buy' rating for the parent company of an international group of diversified building materials businesses. Packaging and paper group Mondi rallied as industry peer RPC Group acquired personal care, healthcare and food packaging business Maynard & Harris for £103.5m.RSA Insurance fell, extending losses after a heavy sell-off on Friday after a profit warning and the surprise exit of its Chief Executive Simon Lee. According to the Financial Times, Chairman Martin Scicluna is to hold "urgent talks" this week with rating agencies in an attempt to avert a credit rating downgrade.House builder Persimmon slumped as Rightmove said the London housing market will cool next year as a proposed tax on property sales limits demand from overseas buyersGlobal information services group Experian also declined along with Aberdeen Asset Management and British Sky Broadcasting Group.FTSE 100 - RisersAggreko (AGK) 1,645.00p +8.51%CRH (CRH) 1,480.00p +4.30%Mondi (MNDI) 940.50p +3.58%Vedanta Resources (VED) 799.50p +3.16%Shire Plc (SHP) 2,786.00p +2.65%Rolls-Royce Holdings (RR.) 1,234.00p +2.58%Associated British Foods (ABF) 2,301.00p +2.54%FTSE 100 - FallersRSA Insurance Group (RSA) 89.75p -2.97%Experian (EXPN) 1,067.00p -0.56%Randgold Resources Ltd. (RRS) 3,944.00p -0.50%British Sky Broadcasting Group (BSY) 801.00p -0.37%Aberdeen Asset Management (ADN) 455.70p -0.09%Persimmon (PSN) 1,135.00p -0.09%RD