BRL I've searched all over the place to find a picture and can't I'm afraid. The only pic I've seen was the one in the mag and I can't remember if that was Today's Pilot or Flyer.
The registration is G-GPST, the builder was Peter Phillips. According to G-INFO the current owners are Speedtwin Developments Ltd. She was first registered in 1990 so my memory of reading the flight test in the 80s was out by a few years!
I've seen it mentioned as landing at Blackpool airport in 2001 but there were nopix on the site. Rats.
Trust me it is a gorgeous little twin with a cruciform tail like the Rockwell Commander.