Wages are still worth a third less in some parts of the country than a decade ago, according to a report. Research by the Trades Union Congress (TUC) found that the average worker has lost £11,800 in real earnings since 2008. The UK has suffered the worst real wage slump among leading economies, the union organisation said. The biggest losses have been in areas including the London borough of Redbridge, Epsom and Waverley in Surrey, Selby in North Yorkshire and…