I want to know the answer to the following question:
When did the Hounslow Heath Aerodrome begin to operate scheduled international commercial services?
All the background I'm provided with is that "The first airport to operate scheduled international commercial services was Hounslow Heath Aerodrome in August 1919, but it was closed and supplanted by Croydon Airport in March 1920.". Is that enough to answer the question?
Answer: yes