Awesome as this is, there's something largely outside of Boom's control that could derail their plans. When Concorde was ready to fly the British and French governments (who paid for the plane's development) had to negotiate with New York for permission to land there. There were concerns about the noise - not sonic booms, just general plane noise, because Concorde was "loud". The problems were actually political ones because Concorde wasn't American. Boom will have to do the same, but London has some really bad NIMBY issues with airports and the expansion of Heathrow at the moment. Problems that will probably continue for decades. If the anti-expansion environmental lobby groups can block this, and they see it as politically useful to do so, there will be a lot of negotiating to wade through.