The point being The Blenheim was a national treasure. Although the pilot in question was legal to fly it, these questions must be asked.
How much radial engine time did he have?
How much tail wheel time did he have?
How much similar type experience did he have?
How much type experience did he have?
The answers should read in the thousands of hours.
He may have had plenty of hours TT but was his background conducive to displaying an a/c which was the only one of it's kind?