Shares in Aquarius Platinum are going well after it announced its acquisition of fellow platinum miner Ridge was approved by 99.99% of Aquarius shareholders.Engineering conglomerate Melrose climbs after saying it is trading in line with expectations for the full year and said cash generation during the first six months of 2009 has been 'excellent'.Pub groups are in focus ahead of updates from Enterprise Inns and Mitchells and Butlers later this week. Marston's and JD Wetherspoon are among today's top risers. FTSE 250 - RisersMelrose (MRO) 104.00p +11.23%DSG International (DSGI) 21.00p +6.33%Aquarius Platinum Ltd. (AQP) 191.25p +6.25%Marston's (MARS) 83.75p +5.02%Barratt Developments (BDEV) 158.00p +4.98%Inchcape (INCH) 21.25p +4.94%Morgan Crucible (MGCR) 90.50p +4.93%JD Wetherspoon (JDW) 433.75p +4.64%Computacenter (CCC) 210.25p +4.60%Cookson Group (CKSN) 244.25p +4.49%FTSE 250 - FallersPV Crystalox Solar (PVCS) 76.75p -3.46%F&C Asset Management (FCAM) 64.25p -2.65%ITV (ITV) 33.50p -2.19%Daejan Holdings (DJAN) 1,932.00p -2.18%DS Smith (SMDS) 63.00p -1.95%Hays (HAS) 83.25p -1.19%TR Property Inv Trust Sigma Shares (TRYS) 52.50p -0.94%SSL International (SSL) 536.00p -0.92%Absolute Return Trust GBP Shares (ABR) 108.00p -0.92%Rotork (ROR) 795.50p -0.87%