NATS News at:
http://www.nats.co.uk/news/news_stories/2004_01_20.html
Says:
"Nats responds to media comments on 2002 airprox
A number of newspapers, radio and TV stations report today on an airprox involving a Virgin 747 and a Delta 767, in which track data blocks for the two aircraft were inadvertently swapped on-screen. Today's coverage highlights changes due to be introduced next month to the software at NATS' en-route centre at Swanwick in Hampshire.
It is important to note that this airprox actually took place in November 2002 and was subsequently assessed by the UKAB as category C (no risk of collision). The UKAB report was published in October 2003.
In fact, there have been no risk-bearing incidents at Swanwick since it became operational two years ago. Immediately after this particular incident, an instruction was issued to controllers reminding them of the correct procedure to follow when individual track data blocks are re-positioned, in order to prevent a repeat of these events."
While on P.18 of the UKAB Report:
"http://www.caa.co.uk/docs/423/Analysis of Airprox in UK Airspace Report No 9.pdf"
They classify the level of Risk as B (Safety Not assured).
Ooohh! Errrrr!