Re did the mission. Targets Start over St Omer Airfield at 2000m.
Red Fighter starts over Biggin Hill.
I got the text and audio message about 4 mins into the mission.
Bombers reported in N6, with Red spitfire (Me) heading away on North Westerly heading
Measured separations where.
Red Fighter to Blue Target 100km
Blue target to Radar range at "Detection" 40km
I will dig out some actual CH radar data I think I have. This will give some typical range capabilities of CH radar.... which wasn't a whole lot compared with modern day microwave radars.