Admiral: Nomura raises target from 1,100p to 1,300p, buy rating kept; Collins Stewart ups target from 975p to 1,110p, hold rating kept; Credit Suisse reiterates outperform rating and 1,300p.Afren: UBS raises target from 140p to 150p, buy rating maintained.Amlin: Jefferies raises target from 317p to 345p, hold rating unchanged.ARM Holdings: Morgan Stanley upgrades from equal weight to overweight, target left at 650p.Aviva: Nomura reiterates buy rating and 630p target; Investec maintains buy rating.Balfour Beatty: Investec keeps sell rating.BG Group: Collins Stewart ups target from 1,750p to 1,850p, buy rating kept.BP: Collins Stewart raises target from 490p to 515p, hold rating kept.Cineworld: Merchant Securities keeps buy recommendation and 244p target; Investec keeps buy rating.Cobham: JP Morgan Cazenove upgrades from underweight to neutral, target lifted from 189p to 224p.Corin Group: Investec reiterates hold recommendation.Diploma: Jefferies ups target from 430p to 485p, buy rating kept.Fenner: Jefferies maintains buy stance and 505p target; Investec upgrades from hold to buy, gives target of 500p.Hunting: Investec maintains buy rating.Logica: Morgan Stanley downgrades from overweight to equal weight, target raised from 80p to 100p.Melrose: UBS ups target from 410p to 425p, buy rating unchanged.Morrison: Jefferies reiterates buy recommendation and 350p target; ING keeps buy rating and 375p target; Bank of America ups target from 330p to 335p, buy rating kept; Espirito Santo keeps buy rating and 330p target.Petrofac: JP Morgan Cazenove upgrades from neutral to overweight, target lifted from 1,737p to 1,870p.Royal Dutch Shell: Collins Stewart ups target from 2,675p to 2,700p, buy rating kept.RPS: Numis downgrades from buy to add, target lifted from 227p to 255p.Schroders: Investec maintains hold rating.Spirax-Sarco: Jefferies keeps hold rating and 1,970p target; Investec keeps buy rating unchanged.Wood Group: UBS lifts target from 730p to 810p, buy rating unchanged.WPP: Jefferies maintains underperform rating and 680p target.