Tuesday broker round-up - UPDATE

Amec: Citi upgrades to buy from sell.Royal Dutch Shell: Citi downgrades to neutral from buy.Petrofac: Investec reiterates buy, 1,705p target under review.Petrofac: Evolution Securities reiterates add and 1,700p target.Whitbread: Evolution Securities keeps buy rating and 1,800p target.Whitbread: Panmure Gordon reiterates hold and 1,800p target.Next: Investec keeps buy stance and 2,995p target.Carpetright: Panmure Gordon upgrades from sell to hold, 400p target kept.Carpetright: Peel Hunt maintains hold and 400p target.Rockhopper: Evolution Securities maintains buy rating, target lifted from 450p to 540p.CPP: UBS cuts target from 135p to 120p, neutral rating unchanged.Bwin.party Digital Entertainment: Evolution Securities keeps add recommendation and 210p target.Bwin.party Digital Entertainment: Peel Hunt keeps hold rating and 145p target.Bwin.party Digital Entertainment: Panmure Gordon keeps hold rating and 130p target.IG Group: Evolution Securities raises target from 530p to 550p, buy rating kept.Travis Perkins: Investec keeps hold and 800p target.Travis Perkins: Panmure Gordon keeps buy rating and 1,050p target.Computacenter: Panmure Gordon reiterates buy rating and 482p target.Go-Ahead: Investec ups target from 1,670p to 1,770p, buy recommendation retained.Go-Ahead: Panmure Gordon reiterates hold recommendation and 1,600p target.Go-Ahead: Peel Hunt keeps hold and 1,281p target.London Stock Exchange: UBS reduces target from 900p to 780p, neutral rating unchanged.HomeServe: Panmure Gordon reiterates sell rating and 190p target.Spirent: UBS cuts target from 160p to 155p, buy rating maintained.Diploma: Panmure Gordon keeps buy rating and 400p target.Gulf Keystone: Evolution Securities reiterates add rating and 210p target.Berendsen: Investec maintains buy recommendation and 560p target.CVS Group: Investec ups target slightly from 108p to 109p, hold rating kept.Bunzl: Investec raises target from 865p to 900p, buy rating unchanged.Advanced Medical Solutions: Peel Hunt keeps hold and 85p target.Timeweave: Investec keeps buy rating and 40p target.BC CVS Group IG Computacenter Travis Perkins Bunzl Whitbread Next Advanced Medical Solutions Group Rockhopper