BP Share News (BP.)

London's blue chips were trading firmly in negative territory on Monday in the aftermath of the Greek public's decision to reject creditors' bailout proposals, with Rolls-Royce and a host of commodity stocks providing a drag.Engine maker Rolls-Royce had trimmed losses by the afternoon but was still sharply lower after disappointing investors with a profit warning, its third in under 18 months. The company guided to a full-year underlying profit of between £1.33bn-£1.48bn, compared with previous target of £1.4bn-1.55bn, citing a deterioration in offshore markets. The stock was down 6.2% at 803.50p, having touched a 52-week low of 771.9p early on.Mining stocks were out of favour in London, such as BHP Billiton and Antofagasta, as investors scaled back their appetite for risk on concerns over Greece.Meanwhile, a steep drop in the price of Brent crude, down 2.5% at $58.82 a barrel, was weighing on oil stocks including Shell, BP and BG Group.Heading the other way was postal operator Royal Mail after Goldman Sachs boosted its target price for the stock to 610p from 585p, saying it expects to seen an improvement in underlying profitability. Goldman maintained a 'buy' rating.Morgan Stanley boosted BAE Systems from 'equalweight' to 'overweight'. FTSE 100 - RisersMarks & Spencer Group (MKS) 549.50p +2.04%SSE (SSE) 1,580.00p +1.41%Reckitt Benckiser Group (RB.) 5,590.00p +1.16%Royal Mail (RMG) 510.50p +1.09%Barratt Developments (BDEV) 645.50p +0.94%Imperial Tobacco Group (IMT) 3,114.00p +0.94%Smiths Group (SMIN) 1,144.00p +0.88%Compass Group (CPG) 1,064.00p +0.76%Centrica (CNA) 267.40p +0.60%BAE Systems (BA.) 454.60p +0.51%FTSE 100 - FallersRolls-Royce Holdings (RR.) 803.50p -6.19%Schroders (SDR) 3,063.00p -3.50%TUI AG Reg Shs (DI) (TUI) 1,020.00p -2.86%Weir Group (WEIR) 1,670.00p -2.85%Royal Bank of Scotland Group (RBS) 349.60p -2.70%Glencore (GLEN) 247.25p -2.14%BHP Billiton (BLT) 1,222.00p -2.12%Hargreaves Lansdown (HL.) 1,111.00p -2.11%Anglo American (AAL) 883.70p -2.07%Antofagasta (ANTO) 668.00p -2.05%