A contrite Marcus Agius, Chairman of under-fire bank Barclays, apologised for the company's involvement in the LIBOR fixing scandal as he unveiled half-year profits ahead of market expectations, causing shares to climb into the top spot. Adjusted profit before tax in the first half of 2012 rose 13% to £4,227m from £3,725m in the first half of 2011, versus market expectations of £3,958m. Heading the other way was publishing group Pearson after its operating profits came in a little sky of expectations as it admitted that the first half has been a little tougher than expected for some parts of the business.Mining colossus Anglo American after first-half profits plunged from $6,571m to just $2,942m on the back of weaker commodity prices and input cost pressures.Tullow Oil was also down after Goldman Sachs cut its target price on the stock to 1776p from 2020p. FTSE 100 - RisersBarclays (BARC) 167.90p +9.31%Weir Group (WEIR) 1,662.00p +3.88%Lloyds Banking Group (LLOY) 30.20p +3.64%ITV (ITV) 78.50p +3.49%Royal Bank of Scotland Group (RBS) 214.60p +3.22%Vedanta Resources (VED) 896.00p +3.11%Marks & Spencer Group (MKS) 332.30p +2.72%Evraz (EVR) 226.50p +2.63%Prudential (PRU) 766.00p +2.47%Aviva (AV.) 285.80p +2.40%FTSE 100 - FallersPearson (PSON) 1,236.00p -4.48%Anglo American (AAL) 1,888.50p -3.84%Capital Shopping Centres Group (CSCG) 322.10p -1.17%Rolls-Royce Holdings (RR.) 875.00p -1.13%United Utilities Group (UU.) 694.50p -1.00%Polymetal International (POLY) 868.00p -0.63%Tullow Oil (TLW) 1,302.00p -0.61%Intertek Group (ITRK) 2,814.00p -0.60%Associated British Foods (ABF) 1,249.00p -0.56%SSE (SSE) 1,303.00p -0.53%NR