Wednesday broker round-up

Alliance Pharma: Investec downgrades from buy to hold, target slashed from 34p to 25p.APR Energy: Credit Suisse keeps outperform rating and 1,300p target.Aviva: Jefferies downgrades from buy to hold, target cut from 386p to 281p.Avanti Comms: Jefferies retains buy rating and 600p target.British Sky Broadcasting: Investec maintains hold rating and 680p target.Bunzl: Investec keeps hold rating and 1,025p target.Carpetright: Oriel Securities upgrades to hold, target lifted from 400p to 650p.F&C Asset Management: Jefferies initiates with buy recommendation and 120p target.Halma: JP Morgan Cazenove downgrades to neutral.ITV: Investec keeps sell rating and 60p target.Logica: Panmure Gordon downgrades to hold, target left at 117[.Northgate: Jefferies keeps buy recommendation and 300p target.Rotork: Credit Suisse keeps outperform rating and 2,200p target.Safestore: Investec puts buy rating and 130p target under review.Serco: Jefferies maintains buy rating and 655p target; BarCap downgrades to equal weight, target cut from 600p to 560p.Standard Chartered: Investec reiterates buy recommendation and 1,800p target; Nomura keeps buy rating and 1,800p target.Walker Greenbank: Merchant Securities maintains buy rating.Wood Group: Credit Suisse keeps outperform rating and 925p target.Yule Catto & Co: N+1 Brewin downgrades to reduce, target cut from 255p to 160p.BC