Concorde: I've watched this lovely gal takeoff and land and have visited her in a decommissioned state, but have never taken flight, so this news is most welcome. I understand for power, they are looking at using a turbine core that will be cocooned at speed and altitude allowing a ramjet to take over. Another surprising change is the planned lack of reheat until well aloft.
Our hypersonic expertise gained through the Blackbird programme will no doubt be helpful, but I also wonder if there are Concorde engineers that might also participate?