Lot's Ait is an ait (island) in the River Thames. It is on the Tideway near Brentford, in the Borough of Hounslow, London, England, and its size is approximately 51,000 square feet (4,738 m2).
Lot's Ait is often grouped with the adjacent Brentford Ait. It was formerly used for the growing of grass and osiers: basket willows, used for basketry, furniture, and cart-making, as well as cattle fodder. It was once known as Barbel Island, as this was a particularly fruitful area for fishing. It contained a yard where barges were repaired until 1980, when it was sold. It acquired a wild character with naturalised willows, rotting boats and rusting dock roofs and became a haven for wildlife. In 2002, the island was offered for sale with outline planning permission for a restaurant, a leisure facility and boat storage. It is only accessible by boat, except at low tide when it is possible to walk across from the Brentford shore, and the nearest road is Goats Wharf, Brentford.[1]
| Next island upstream | River Thames | Next island downstream |
| Isleworth Ait | Lot's Ait | Brentford Ait |