Shares in Heritage Oil have taken a hit after the company terminated its merger discussions with Turkey's Genel and opted instead to sell some assets to Italian oil giant Eni.The UK exploration and production company has conditionally agreed to sell its interests in blocks 1 and 3A in Uganda for $1.5bn.The consideration comprises cash of $1.35bn plus a deferred, contingent consideration of either $150m in cash or an independently valued interest in a mutually agreed producing field.Also lower is support services and asset management firm Mitie, which posted a rise in profits in the six months to September 30 and said efficiency drives in the private and public sector will create further opportunities for growth in the next year.Turning to the risers, platinum miner Aquarius Platinum climbs after saying has tried to head off a shareholder revolt by justifying its decision to pay its auditor $0.684m in additional fees. It is benefiting from higher prices from the precious metal.FTSE 250 - RisersFerrexpo (FXPO) 206.10p +8.25%Aquarius Platinum Ltd. (AQP) 366.90p +6.04%Robert Wiseman (RWD) 496.50p +5.35%Trinity Mirror (TNI) 165.80p +4.41%BlueBay Asset Management (BBAY) 354.50p +4.26%Daejan Holdings (DJAN) 2,810.00p +4.04%WH Smith (SMWH) 549.50p +3.97%DS Smith (SMDS) 122.50p +3.90%Merchants Trust (MRCH) 339.00p +3.86%Murray Income Trust (MUT) 544.00p +3.82%FTSE 250 - FallersHeritage Oil (HOIL) 489.50p -3.55%Domino's Pizza UK & IRL (DOM) 300.90p -2.75%Xchanging (XCH) 207.70p -1.75%Lamprell (LAM) 200.00p -1.72%Stobart Group (STOB) 124.00p -1.59%Mitie Group (MTO) 233.00p -1.40%CSR (CSR) 414.70p -1.33%Davis Service Group (DVSG) 416.80p -1.23%Evolution Group (EVG) 157.40p -1.07%SVG Capital (SVI) 131.00p -1.06%