The pound extended gains against the euro on Thursday (October 29th), climbing to a six-week high against the single currency.Reuters reports that support for the pound came as investors looked to trim excessive short positions on the currency, which has languished against the euro in recent weeks amid concern for the prospects of economic recovery in the UK.Speaking to the news agency, Geoff Kendrick, a senior currency strategist at UBS, said that weakness in the latest gross domestic product figures has had a particularly adverse effect on market sentiment towards sterling."People had become quite long euro/sterling thinking that 94 pence was a done deal, but with equities lower those positions have come off ... Euro/sterling has been leading the way to the downside," he added.Equities strengthened at the beginning of trading in Europe this morning, helping to curb movements into safe-haven currencies such as the US dollar and the yen.