Online and catalogue retailer N Brown fell after reporting an 8.0 per cent rise in revenue and 5.9 per cent increase in operating profits in the first half. Adjusted earnings per share, however, were broadly flat, up just 0.6 per cent at 12.55p. Meanwhile, house builders Barratt Developments and Bovis Homes were sharply higher after Goldman upgraded both stocks to 'buy'. Sector peer Taylor Wimpey meanwhile was labelled as a 'conviction buy'. Belway was also making decent gains.Shares in Ladbrokes were on the up; yesterday Jefferies Group downgraded the group from 'buy' to 'hold'. Imagination Technologies shares received a reiteration of 'hold' from Deutsche Bank, pushing the stock into the red. News on Tuesday that semiconductor group MediaTek had acquired a licence for rival microchip designer ARM's Cortex-A50 processor cores and Mali graphics technology hit IMG in the gut. FTSE 250 - RisersLadbrokes (LAD) 180.70p +6.92%Bellway (BWY) 1,344.00p +5.83%Barratt Developments (BDEV) 322.40p +4.37%Bovis Homes Group (BVS) 731.00p +4.35%Crest Nicholson Holdings (CRST) 344.00p +4.31%Taylor Wimpey (TW.) 102.70p +4.05%St. Modwen Properties (SMP) 325.50p +3.76%Kentz Corporation Ltd. (KENZ) 494.40p +2.94%QinetiQ Group (QQ.) 186.00p +2.88%Telecom Plus (TEP) 1,408.00p +2.70%FTSE 250 - FallersBrown (N.) Group (BWNG) 485.40p -5.84%Imagination Technologies Group (IMG) 262.70p -4.99%Balfour Beatty (BBY) 263.50p -3.41%Supergroup (SGP) 1,078.00p -3.14%Bank of Georgia Holdings (BGEO) 2,039.00p -3.14%Kazakhmys (KAZ) 247.20p -3.13%Ted Baker (TED) 1,700.00p -3.13%Genus (GNS) 1,330.00p -2.99%Amlin (AML) 391.80p -2.85%Halma (HLMA) 531.50p -2.74%NR