Online gaming firm bwin.party digital entertainment leapt into the top spot after it posted a robust set of full year earnings and believes it is well placed to take advantage of regulatory and technological shifts in its industry.Private equity investment firm 3i was another big riser after it revealed in a trading statement that, after a tough start to the year, market sentiment has improved in the last couple of months, leading to a strong performance in the company's investment portfolio - although the rally has come a bit late to have a significant effect on performance in 3i's current financial year, which runs to the end of March.Meanwhile, transport firm FirstGroup was the biggest faller after it said lower economic activity in the north of England is putting pressure on its UK Bus business. The group says like-for-like revenues in UK Bus, in the 12 months to the end of March, will be 1.5% ahead of 2010-2011. The North of England and Scotland however are seeing "considerably lower" growth rates and that's where 60% of revenues are generated. FTSE 250 - RisersBwin.party Digital Entertainment (BPTY) 154.20p +5.47%3i Group (III) 210.80p +3.33%Ruspetro (RPO) 207.50p +2.52%Drax Group (DRX) 537.00p +2.38%Ferrexpo (FXPO) 298.20p +1.95%New World Resources A Shares (NWR) 437.40p +1.67%Kentz Corporation Ltd. (KENZ) 458.30p +1.39%Sports Direct International (SPD) 285.90p +1.31%Kenmare Resources (KMR) 49.18p +1.30%Daejan Holdings (DJAN) 3,035.00p +1.13%FTSE 250 - FallersFirstGroup (FGP) 249.30p -13.77%National Express Group (NEX) 236.80p -6.03%Dixons Retail (DXNS) 18.25p -5.24%TalkTalk Telecom Group (TALK) 137.60p -5.10%Barratt Developments (BDEV) 139.00p -4.92%Petropavlovsk (POG) 592.00p -4.67%Go-Ahead Group (GOG) 1,242.00p -4.53%Northgate (NTG) 206.30p -4.40%Centamin (DI) (CEY) 68.05p -4.22%Essar Energy (ESSR) 145.80p -4.08%NR