Market Wrap: Rio Tinto share buyback, GSK's profits, Dunelm price rises & more

Share Radio's Robyn Dwyer brings you Market Wrap, a roundup of what's been happening in the businesses of Britain and the world. To help put the day's events in context, Robyn was joined by Russ Mould, investment director at the online stockbroker's AJ Bell. On today's show: mining giant Rio Tinto is launching a share buyback programme of $500m due to an increase in the price of iron ore, Sir Andrew Witty, GlaxoSmithKline's outgoing chief executive, has defended his long-standing decision not to break up the company as he presented his last set of results before stepping down next month & homeware retailer Dunelm has warned that the slump in the pound since the Brexit vote will result in price rises on thousands of products.