Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: The owners of Scotland's largest power plant say its future is uncertain because of the £40m annual fee it has to pay to be connected to the National Grid.

What is the National Grid and why does it cost to connect to it?