[RunItUpTheGut]

I didn't know that there was an Laurel County High....What would the third school be called? London High?

When they decided to split the schools Laurel County High School became what is known as South Laurel today. They built North Laurel due to a growing population.

To be honest, if they build a new one, it would almost certainly have to be close to Corbin, and that would mean it would be the farthest South out of the 3 but it could be named that.
I wouldn't be surprised to see something like a West Laurel