Turner prize

One of the finest Turner watercolours left in private hands is to be sold at Sotheby’s. The Lake of Lucerne

from Brunnen – one of JMW Turner’s greatest watercolours – is expected to fetch up to £1,800,000 when it goes under the hammer in London on July 4. The painting forms part of a group of “finished” late landscapes inspired by the English artist’s travels to Switzerland between 1841 and 1844.