(Reuters) - London's blue-chip stocks were higher on Friday, snapping three sessions of losses, fuelled by a rally in mining, oil and banking stocks, while heavyweight Vodafone fell again and M&A news triggered a stout rally in pub chain Fuller, Smith & Turner. FTSE 100 was 0.4 percent higher by 0826 GMT, underperforming its European peers as heavyweight Vodafone dragged and the rally in sterling weighed on the exporter-heavy index. The midcap index gained 0.1 percent Both indexes were still..