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: London is "catching up" with Covid-19 hotspots in northern England, Mayor Sadiq Khan's office has said.

Coronavirus: London 'catching up' with Covid-19 hotspots