Easy flying between EU and us with air transport deal

The Open Skies Agreement allows EU airlines to fly from anywhere in the EU to the US, replacing the current rule that restricts flights to originating from the airline's home country. The agreement is celebrated for its benefits to passengers, airlines, and the transatlantic economy. However, Britain initially opposed due to restrictions on flights from Heathrow and foreign ownership of US carriers. Future negotiations aim to open the US market further, with the EU reserving the right to suspend parts of the agreement if concessions are not made.

What concerns did Britain have regarding the open skies agreement?

What are the future implications if Europe does not secure further concessions from Washington?