主播大秀

East Anglia is a region shaped by water so it's not surprising that many inventions from the east of England are connected to the sea.

Dr Aarathi Prasad explores some water-related inventions - first the hovercraft , a celebrated,and at times ill-fated,British invention conceived on a stately Suffolk estate.

She also meets a husband-and-wife team who build unique flood protection barriers in a Norfolk blacksmith's forge, after which she tackles the challenge from a serial Essex inventor who makes filthy water safe to drink.

Finally, there's a 19th Century eccentric who designed life-saving apparatus that is still used today the world over.