It looks like the offspring of an F-22 and an F-35. Similar notional designs have appeared as what an updated F-22 would look like. Since the announcement for the Tempest was made just after Trump and US Defense Secretary Mattis visited, I have a sneaking suspicion that the US is about to announce a similar project and that the “Tempest” will be the UK variant badge for a US successor to the F-22.
“I have a sneaking suspicion that the US is about to announce a similar project and that the “Tempest” will be the UK variant badge for a US successor to the F-22.”
You might be on to something. I could see Lockheed floating some F-22 updates with a delta wing like that. And the British have been fond of joint ventures for a long time, so they might bite.