On: The Revival of Concorde

[dingaling]

They could still fly the aircraft within the UK on a restrictive Permit to Fly, rather than on a type certificate.

That does not require manufacturer support, it's similar to US Experimental classification. But it would not permit carriage of passengers.

[gsnedders → dingaling]

As far as I'm aware, XH558 flew on a Permit to Fly from the CAA, hence why it never left the UK. Note that being on a Permit to Fly restricts it to VFR.