Soft drinks firm Britvic leapt on the back of a strong set of interim results, after an improved underlying performance across the business, although it did caution on market conditions remain challenging.Kazakhmys was lower after UBS reduced its target price from 465p to 385p and downgraded the stock from buy to neutral. First Group dropped after Morgan Stanley cut its target price from 195p to 176p, while upgrading the stock to equal-weight. The company on Monday issued a disappointing outlook. FTSE 250 - RisersBritvic (BVIC) 521.50p +10.44%Intermediate Capital Group (ICP) 496.30p +8.77%Hochschild Mining (HOC) 272.40p +4.77%Alent (ALNT) 363.80p +4.12%Travis Perkins (TPK) 1,605.00p +3.75%SDL (SDL) 367.00p +3.67%Morgan Advance Materials (MGAM) 301.20p +3.61%Kenmare Resources (KMR) 32.60p +3.49%Senior (SNR) 282.60p +3.48%Supergroup (SGP) 785.00p +3.02%FTSE 250 - FallersKazakhmys (KAZ) 344.00p -5.83%FirstGroup (FGP) 146.30p -4.81%New World Resources A Shares (NWR) 114.80p -4.33%TalkTalk Telecom Group (TALK) 237.70p -3.84%Fidessa Group (FDSA) 1,977.00p -3.42%Menzies(John) (MNZS) 740.00p -3.20%Provident Financial (PFG) 1,575.00p -2.78%Inchcape (INCH) 563.50p -2.42%QinetiQ Group (QQ.) 202.50p -2.17%Paragon Group Of Companies (PAG) 318.30p -2.06%NR