Prunella Scales is in ‘canal heaven’ as she floats along the tropical backwaters of Kerala, southern India. Sailing further afield for their latest adventure, Pru and husband Timothy West explore the waterways of India in this charming two-part series, which offers a new perspective on the subcontinent. The couple learn about the region’s historic spice trade, which was dependent on the canals, many of which were built by Britain.