Panmure Liberum has repeated a 'Sell' for Tullow Oil PLC (LSE:TLW) shares, and slashed its price target to 5.4p, warning that the group is “going backwards” at a time when a critical refinancing is fast approaching. In a sharply bearish note, the stockbroker argues that Tullow's flagship Jubilee field continues to disappoint, with production issues and early water breakthrough dragging output to the bottom end of guidance at 40,000 to 45,000 boepd - although the TEN field is performing well, its scale is far too small to offset Jubilee's underperformance.