Ben Rich wasn't the only person to say this. A leading hypersonics expert and consultant to military and industry, who is in a position to know, also made this claim. Most important, Adelbert "Buz" Carpenter (who came up with the AURORA name) has explained what it was for. It's not really a matter for debate any more.
Could I perhaps ask your opinion on quite what is referred to in the following :
"In his UK Restricted minute ‘Wrap Up of UAP Material’ dated 22 March 2000 the report’s author – a retired RAF scientist – refers to a collection of slides and photographs that he consulted in the MoD’s archive.
The UK Restricted memo that refers to a D-Notice issued in the 1990s on the Astra/Aurora project (Copright: Dr david Clarke)
These contained images of the ‘ASTRA/AURORA‘ project –[speculative] a top secret, hypersonic Cold War spyplane. [/speculative]
The author goes on to note ‘there was a Press D-Notice issued at the time‘.
The rerference, at least, is not hokum and is a matter of record; images of which referenced much earlier in this thread.