You can't buy it fresh in supermarkets - but it's growing for free and unnoticed by the River Lea.

The name of the River Lea was first recorded in the 9th century, although is believed to be much older.

The eastern boundary of the borough is marked by the River Lea.

The other central feature of Bow is the bridge across the River Lea.

Originally powered by a back water of the River Lea.

The eastern boundary of the district is the River Lea.

The River Lea forms the western boundary of the borough.

Brown dammed the River Lea to form two lakes, one of which is 60 acres (240,000 m2) in size.

These crossings passed across a true marsh, either side of the River Lea.

The first iron bridge across the River Lea was built in 1810.