LONDON - European shares drifted higher in choppy trade on Friday as signs Greece would seek political consensus on a new aid package and dump a referendum helped cap some fears of an imminent default, although the outcome remains uncertain. Banks, many of which have a significant exposure to the peripheral euro zone economies and have taken a hit on their balance sheets, were among the top gainers, while miners got some support from firmer metals prices that rose on hopes of an improvement in demand for raw materials.