RBS is topping the risers after making £1.05bn in underlying first quarter operating profit, p from £0.88bn the year before.Flying higher is airline IAG after it saw an improved performance in the first quarter as it reported its first results since forming from the merger of British Airways and Spain's Iberia. Car insurer Admiral is firmer after seeing strong growth so far this year, with turnover up by 56% in the first quarter.Engine maker Rolls-Royce has accelerated ahead after saying that is trading in line with guidance, and expects sales to double of the next ten years.Also higher is mining giant Rio Tinto after again pushing back the deadline for its takeover offer for Africa-focused coal miner Riversdale Mining, giving minority shareholders more time to jump on board before the target is delisted from the Australian Stock Exchange. IMI, the engineering firm, saw shares fall despite announcing that results will be "well ahead" of last year. Also announced was the appointment of Roberto Quarta, currently chairman of Rexel SA, who is to take over as chairman of IMI next month.---BCFTSE 100 - RisersRoyal Bank of Scotland Group (RBS) 43.08p +6.42%ITV (ITV) 74.95p +3.95%ARM Holdings (ARM) 586.00p +3.35%Carnival (CCL) 2,633.00p +3.25%International Consolidated Airlines Group SA (IAG) 253.50p +3.05%Tullow Oil (TLW) 1,355.00p +2.73%Weir Group (WEIR) 1,900.00p +2.70%Anglo American (AAL) 3,018.50p +2.50%Admiral Group (ADM) 1,697.00p +2.11%BG Group (BG.) 1,434.00p +1.99%FTSE 100 - FallersMan Group (EMG) 247.00p -2.45%Schroders (Non-Voting) (SDRC) 1,369.00p -2.07%Amec (AMEC) 1,161.00p -1.78%Hargreaves Lansdown (HL.) 608.00p -1.70%IMI (IMI) 1,045.00p -1.69%Scottish & Southern Energy (SSE) 1,308.00p -1.65%Schroders (SDR) 1,675.00p -1.47%Royal Dutch Shell 'B' (RDSB) 2,212.00p -1.38%Standard Life (SL.) 216.80p -1.36%Inmarsat (ISAT) 596.00p -1.16%