I don't think that's the way it worked. I have gone back through old emails to find one from the late Ralph Hawkins, re dating a couple of 30's bikes. The records show that both went to Tozer, Kemsley & Millbourn of London - shipping agents.
I think the (factory) record trail stops there.
'51,'56 Squares, '48 VH, '27 Model C, R67/2, Mk IV Le Mans, '06 Super Duke and Ariel projects.