he River Lynch, also known as the Lynch Brook, is a minor tributary of the River Lea, in Hoddesdon, in which UK country? 
River Lynch: The River Lynch, also known as the Lynch Brook, is a minor tributary of the River Lea in Hoddesdon, Hertfordshire, England. River Lea: The River Lea in England originates in Marsh Farm, Leagrave, Luton in the Chiltern Hills and flows generally southeast, east, and then south through east London where it meets the River Thames, the last section being known as Bow Creek.
England