Hmmm..... Don't know if I can get any London Plane, but I do have some Arkansas Riverbottom Sycamore. Been reading up on it and sycamore along with beech is used for furniture, flooring, and wood turnings. The wood is hard and dense for both species. For a body, I figure if soft hardwoods like basswood and poplar can produce acceptable tones, then these woods would be ok for a body. From what I have read on these woods, both are stable with beech being more stable but sycamore should be ok too. Drying is the big key and we have a local kiln here that is drying some ash for me now. What the hell, nothing ventured nothing gained. I am gonna try both for necks. Laminate it up and see what happens. The wood was free so experimenting will only cost me my time and I would rather use local woods. The thought of ordering maple or mahogany neck blanks kinda irks me.
Thanks for responding butcherboy.