I was trying to plan a trip close to the RA(T) for the Farnborough Airshow and found that NOTAM J1311/12 (AIC Mauve 059/012 also refers) is not being drawn correctly on SD Plan. It appears to be drawn as a simple circle centered on Farnborough.
Perhaps Tim would like to comment

Tim
Many thanks for the explanation. I understand your reasoning.
Perhaps we should convince AUS to ensure that NOTAM originators do so in the correct format.