Monday broker round-up

AMEC: HSBC cuts target from 1,280p to 1,275p, overweight rating kept.Aviva: Exane BNP Paribas downgrades to neutral.British American Tobacco: Nomura keeps buy rating and 3,390p target.British Land: JPMorgan Cazenove ups target from 560p to 610p, overweight rating kept.BSkyB: Nomura maintains buy rating and 950p target; Goldman Sachs raises target from 837p to 890p, conviction buy rating maintained.Centrica: Credit Suisse downgrades to neutral, target cut from 370p to 330p.Diageo: Deutsche Bank downgrades to hold, target raised from 2,200p to 2,350p.ENRC: UBS cuts target from 615p to 585p, buy rating kept.Experian: Nomura reiterates buy rating and 1,035p target.FirstGroup: Goldman Sachs upgrades to conviction buy, target upped from 300p to 360p.FlyBe: HSBC cuts target from 90p to 80p, overweight rating kept.G4S: UBS keeps neutral rating and 280p target.GlaxoSmithKline: Jefferies downgrades from buy to hold, target cut from 1,600p to 1,550p.Hammerson: JPMorgan Cazenove ups target from 500p to 535p, overweight rating kept.Hargreaves Services: Westhouse Securities initiates coverage with buy rating.Imperial Tobacco: Nomura keeps neutral rating and 2,197p target.Tullow Oil: Bernstein cuts target from 2,140p to 1,920p, outperform rating kept.Whitbread: Deutsche Bank downgrades to hold, target lifted from 2,200p to 2,350p.BC Tullow Oil Aviva British Land Centrica Experian British American Tobacco Diageo Hargreaves Serv Hammerson Glaxosmithkline Whitbread Firstgroup