When I was reading the other day about Hardmead Lock Cottage (near Ware) being for sale, I note that it's recorded as being either on the River Lea or the River Lee.
Is it the Lee or Lea? I've often wondered.
The park in the valley is officially the Lee Valley Park.
The River Lee - Our River, says the Lee Education Network.
The River Lea, says Peter Marshall on his Lea Valley Website, but he suggests that Lee Navigation is a more appropriate name and spelling for the waterway from a boating perspective.
So, not much consensus there. It really needs a 'disambiguation page', like on Wikipedia. Try this one.