This is the longest day of the year, a day and night when darkness barely touches the River Mersey or the historic ports of Liverpool and the Wirral to each side of that river’s great estuary. But even on this solstice day it’s not all about heritage. The estuary’s traditional maritime installations are here matched by the forward-looking technology of wind turbines, a constant reminder that energy is not ours to squander. Longer evening light, with the clocks forward year-through as 10:10 proposes, would help reduce this waste consistently without effort.