This plummeted off the ATS radar fast! Nice find Karl and news to me. I also consider the Why Files website to be an unused source of new stories that are ripe for threads. He's been planning an overhaul of the site for ages and will, hopefully, fix some of those audio files.
The incident reminded me of the Townsend-Withers case described by Randles...
TW: We were above Salisbury Plain in Wiltshire, outCollision Course
of Boscombe Down, and we got up to over 60,000 feet. It
was just after noon on a cloudless day as we set off on a
northwesterly heading when my radar picked up a target at
five miles behind pacing us like an echo. Fearing the return
of the interference problems, we switched off the system,
reset it, and did a number of internal checks. This did not
clear the target. Now we knew that something really was
following us. But that was virtually impossible at this height.
JR: Could it have been a secret flight or a spy plane?
TW: We were a secret flight and because of the importance
of our job that day we were given cleared air space. I
knew this was something important—and, of course, that it
could have been an enemy aircraft. So I clambered into the
rear gun turret to investigate. Sure enough, there was an
object trailing behind. It was round and silvery, reflecting
sunlight like a giant mirror. I told the pilot to increase speed.
Although we got to 225 knots the object stuck with us so I
recommended “a big radius turn” in order to shake it. The
object vanished from the radar now because the system was
only operating in a rearward-facing mode. However, the
object was not visually absent for long. Within moments it
was dead ahead. As we came out of the turn, we flew
towards the glinting object and closed the gap very fast. For
about 30 seconds we were on a collision course. During this
period we had a close-up view.
JR: What did it look like?
TW: It was silvery and very thin in body shape. Overall
it appeared to be a remarkably flat oval without any sign
of wings or windows and just the faintest hint of a tail fin at
I'm assuming that JR did the due diligence, because I've been unable to find his service records or reference to his existence in the RAF personnel lists or National Archives. Even a basic google search doesn't help.