Northumbrian Water has spurted higher on reports a Canadian pension fund is poised to bid.Fellow water group Pennon rises in sympathy.On the downside, pub groups are out of favour, with Marston's and Greene King among the fallers.FTSE 250 - RisersNorthumbrian Water Group (NWG) 288.80p +11.68%Pennon Group (PNN) 540.50p +5.05%Aquarius Platinum Ltd. (AQP) 388.20p +4.10%Barratt Developments (BDEV) 123.90p +3.51%HMV Group (HMV) 78.95p +3.41%Investec (INVP) 440.60p +3.35%Croda International (CRDA) 773.50p +3.00%Eaga (EAGA) 143.70p +2.64%Ecofin Water & Power Opportunities (ECWO) 137.50p +2.54%Close Brothers Group (CBG) 710.00p +2.53%FTSE 250 - FallersLamprell (LAM) 185.60p -3.48%Rathbone Brothers (RAT) 803.50p -3.19%Renishaw (RSW) 587.50p -2.49%Marston's (MARS) 86.00p -2.22%Yell Group (YELL) 35.83p -2.02%F&C Asset Management (FCAM) 68.20p -2.01%Computacenter (CCC) 291.40p -1.95%ARM Holdings (ARM) 190.70p -1.85%Evolution Group (EVG) 124.70p -1.81%Greene King (GNK) 438.00p -1.64%