How many bikes are we talking about here ?
I'm wondering if it was like the owner of a Matchless here, who registered it just after the Y2K kerfuffle.
He said they couldn't find it as a maker, so they registered it as a Yamaha.
And had the papers to prove it !!
It does sound like there will be a better story behind ye Lilacs though.
As an aside, I always liked the look of those little Lilacs - and the (unrelated) Lambretta race ones.
Did end up with a LeMans ...