Any idea what time the arena will disappear, Sat night?
Do the V1's have an airstart and will they actually hit something, if nothing else but the ground, near London?

I was just in the test arena, then Dewolf came in.

If you meet them at level flight, you can't catch them.

I was at 6,500' and one was passing below me, executed a right turn, boost to max and dove. Opened up at D6 and the V1 went into evasive action

It was diving, climbing, turning left and right (only moderate turns), but I managed to get it at D4 and flamed it, but it took 67% of my ammo. I took 60% fuel so I was able to get quite fast.

The V1's need to fly straight and level till they make their decent on London.

I had similar results to Beaver, BUT I was never able to get close enough to a V1 to fire on it. (That was after an hour of trying and, unlike a S3, I had inflight radar) The one I happened to "think" I could fire on also took WARPING evasive action.
At this point, if I were an Allied Commander, I would just assume that all V-1s would reach their targets and not bother to assign anyone to "intercept" them. They are sort of like the venerable Night Stalkers Squad, "If you see a V-1, it's too late."
The Spit IX is certainly NOT the proper airplane for the job. It cannot catch one.

Thanks for the opportunity to find out that trying to get one is fruitless.

EDIT: Apparently the aircraft choice varies from field to field. The field I, obviously erroneously, selected ONLY had the Spit IX available, which made me believe that it was the only a/c available for the "test". Results of others may vary.