Can't really win with the Farnborough TRA - simplest would be to draw a (big) circle around Farnborough and make that a TRA, but then people complain it is taking up too much space.
So they plotted the minimum they need and that makes it harder to visualise and harder for NotamPlot et al to draw.
(Once you see the picture in the AIC then it's easy to see what's happening)
What would you prefer they do in 2008?