Silverstone are keen on hosting an F1 race in the future, but it would mean having to reach a revised deal from Liberty Media in order to host any future races.
The fast-growing, communist country will be only the third Southeast Asian nation to host an F1 race as the glitzy franchise seeks to tap new regional markets after an US$8 billion takeover by United States (US) firm Liberty Media previous year.
Formula 1 will head to Hanoi in April 2020 for the inaugural Vietnamese Grand Prix. This is the ideal formula for Grand Prix racing and I look forward to this becoming a real highlight of the F1 calendar. Hamilton won the Brazilian race in 2016 and lifted his first F1 title in Sao Paulo 10 years ago, finishing fourth after a dramatic overtake on the last lap. "The race has been held at Brands Hatch and other venues", he said in a Formula One question and answer.
The sport already hosts races in Singapore, China and Japan across the largest continent.
Bratches replied: "We're a 68-year-old entity and the nature of grand prix racing is that it is dynamic".
Silverstone held the first official F1 grand prix in 1950 and has been a permanent fixture on the calendar since 1987.
"We are a public company and we have a lot of stakeholders and shareholders and we're trying to marry what's best for fans with running a successful business".
"Certainly the U.S. remains priority", Carey added. Firstly, we want to preserve the heritage races, they are very important to Formula 1 and they are very important to fans.
Bratches explained that he wants to see a mix of circuit types on the calendar, with an emphasis on growing the number of street races, such as the proposed circuit in Vietnam's capital Hanoi.
The Hanoi race will be run on a 5.565-kilometer layout in the west of the city, adding another street race to the existing ones in Monaco, Singapore, Azerbaijan and Melbourne's Albert Park in Australia.
Bratches said Hanoi fitted the new vision of the sport's owners, with another street race in Miami also in the pipeline. "The race is also an important part of our broader strategy to grow our sport in Asia, and clearly, Vietnam is a driving force for the growth in Asia".