|Hitchin and Harpenden|
Mangrove Green is a hamlet in northern Hertfordshire, close by the border with Bedfordshire and sitting just north of Cockernhoe. Its population is 108. It is built on a single lane running directly north from Cockernhoe, which is a dead-end lane, with closes off it, and no more.
The village has a green, as its name suggests, and one pub, the King William IV. The lane continues to a farmstead, and can then be followed only on footpaths over the fields northwards to Lilley, to which estate it long belonged.building it up.