It is rare to find a landscape untouched by our lines – the hedges, walls, ditches and dykes built to enclose and separate; and the green lanes, roads, canals, railways and power lines, designed to connect. This vast network of lines has transformed our landscape.

In Linescapes, Hugh Warwick unravels the far-reaching ecological consequences of the lines we have drawn. As our lives and our land have been fenced in and threaded together, so wildlife habitats have been cut into ever smaller, and increasingly unviable, fragments. He talks to Oliver Balch author of Under the Tump.