Artists Himali Singh Soin and David Soin Tappeser explore the complex weave of histories and myths around Britain’s imperial salt monopoly in India. Paul Waters joins them as they create an open-air installation at the Somerset House gallery in London, paired with a poignant indoor exhibition occupying spaces formerly used to administer Britain’s colonial-era salt tax. The 80 metre long fabric installation is to replicate the Inland Customs Line, a monumental 2,500 mile long hedge across India, created by Britain in the 1800s, to enforce salt taxation. This reinterpretation draws on cotton printed with botanical dyes from the hedge's original plants, to highlight the human and ecological cost of colonial extraction. Himali and David aren’t just creating one exhibition in one location. They are also creating a parallel installation further along the river Thames, at the Tate Britain art gallery and we’ll be following them as they work across both sites.