Engineering companies Smiths Group and Weir Group were the top gainers on Thursday.UBS upgraded Smith Group's stock to 'buy' from 'neutral', helping to push shares higher.Tate & Lyle advanced as Morgan Stanley rated the sweetener maker's stock for the first time on Thursday, recommending an 'overweight' rating.WPP edged higher after the advertising company had its 'buy' rating reiterated by investment analysts at Bank of America in a note issued on Thursday.On the downside, Royal Bank of Scotland (RBS) retreated after business groups on Wednesday night warned that the bank's latest £20bn lending scheme would only work if firms are not hit with prohibitive repayment charges. RBS is encouraging customers to borrow as it has a surplus in UK corporate deposits.Standard Life declined as the pensions company launched a new transfer option that allows drawdown customers to immediately alter the amount of income they can access from their pension pot.International Consolidated Airlines Group (IAG) dropped as Bankia sold its its 12.1% holding in the parent company of Iberia and British Airways. FTSE 100 - RisersSmiths Group (SMIN) 1,304.00p +2.68%Weir Group (WEIR) 2,181.00p +2.68%Tate & Lyle (TATE) 822.50p +2.62%WPP (WPP) 1,107.00p +2.59%Bunzl (BNZL) 1,273.00p +2.17%SSE (SSE) 1,513.00p +2.09%Next (NXT) 4,588.00p +2.07%Wood Group (John) (WG.) 796.50p +1.98%ITV (ITV) 139.90p +1.75%Fresnillo (FRES) 881.50p +1.73%FTSE 100 - FallersRoyal Bank of Scotland Group (RBS) 274.80p -1.96%Standard Life (SL.) 347.70p -1.84%International Consolidated Airlines Group SA (CDI) (IAG) 260.80p -1.29%Carnival (CCL) 2,290.00p -1.25%Barclays (BARC) 285.55p -1.14%BAE Systems (BA.) 385.00p -1.08%Pearson (PSON) 1,144.00p -1.04%Croda International (CRDA) 2,407.00p -0.91%Aggreko (AGK) 1,649.00p -0.60%G4S (GFS) 234.30p -0.59%RD