Patterson - you're not thinking this through. Manned aircraft could be recognised over France because of the manoeuvres required to form up at altitude. V1s don't do that and can be distinguished from aircraft. Actually, since V1s flew at low altitude, I'm not sure that CH would detect them anyway, and it they're undetected by radar then nobody is going to be scrambled! It may be that CHL was used instead, but that just takes us back to the same idea of it being trivial to distinguish a manned aircraft from a V1 using contemporary radar, simply based on speed and flight path.