Hochschild Mining's shares surged as the price of gold and silver increased. Enterprise Inns rallied after saying it was on track to post growth in income by the end of its financial year.Ladbrokes declined after the UK's second largest bookmaker reported a slump in pre-tax profits for the first half of the year, blaming hot weather for keeping people out of betting shops.Ferrexpo tumbled as Investec analysts recommended a 'hold' rating for the stocks, citing iron ore price volatility, unpaid VAT recoveries and geopolitical uncertainty as a burden on the company's further growth. FTSE 250 - RisersHochschild Mining (HOC) 187.90p +7.07%Enterprise Inns (ETI) 148.10p +5.26%Diploma (DPLM) 632.50p +4.89%Polymetal International (POLY) 683.00p +4.67%Kenmare Resources (KMR) 29.57p +4.34%Interserve (IRV) 529.00p +4.24%Kentz Corporation Ltd. (KENZ) 450.20p +3.97%FirstGroup (FGP) 109.00p +3.91%Mondi (MNDI) 1,024.00p +3.91%Spirax-Sarco Engineering (SPX) 2,996.00p +3.63%FTSE 250 - FallersLadbrokes (LAD) 200.00p -3.71%Ferrexpo (FXPO) 180.00p -2.70%Carillion (CLLN) 291.90p -2.54%Henderson Group (HGG) 167.10p -1.71%Alent (ALNT) 349.20p -1.66%Crest Nicholson Holdings (CRST) 344.50p -1.32%Cobham (COB) 296.20p -1.10%United Drug (UDG) 340.40p -0.96%SVG Capital (SVI) 387.10p -0.74%Fidelity China Special Situations (FCSS) 93.35p -0.69%RD