( the facebook page - @MarkHaddonAuthor
is run by vintage books / doubleday
i don't have any input
and i don't see any of the comments...
predictably it has far more visitors )

  bennie railplane

trawling through an encyclopaedia of c.1939 for red house stuff i stumbled on this extraordinary vehicle of which i had never heard before. it was real, it was built and ran in glasgow in the mid 30's and carried people, albeit for just over a hundred yards before its inventor went bankrupt halting any further development.

http://www.gearwheelsmag.co.uk/archive/the_bennie_railplane_feature_13.htm