Monday broker round-up - UPDATE

Antofagasta: AlphaValue downgrades from add to sell, target cut from 1,201.3p to 915p.Avanti Communications: Jefferies reiterates buy rating and 600p target.Chariot Oil & Gas: Jefferies keeps buy rating and 355p target; Merchant Securities keeps buy recommendation and 232.1p target.Dignity: Investec ups target from 972p to 992p, buy recommendation maintained.Dixons Retail: AlphaValue upgrades from add to buy, target left at 21p; UBS raises target from 15p to 18p, neutral rating kept.Henry Boot: Investec reiterates buy rating and 185p target.International Airlines Group: Credit Suisse raises target from 195p to 198p, outperform rating kept.Kesa Electricals: Investec upgrades from sell to hold, 57p target unchanged.Logica: Merchant Securities cuts target from 83p to 80p, hold rating maintained.Mears Group: Investec maintains buy rating and 283p target.SABMiller: Investec upgrades to buy, target lifted from 2,610p to 2,800p.Shanks: Jefferies maintains buy recommendation and 133p target.Thomas Cook: UBS cuts target from 23p to 21p, neutral rating kept.BC International Airlines Mears Antofagasta Chariot