So last week my Scorcher TRs finally wore thin enough that one developed a hole in its sidewall big enough for the tube to herniate out. :-) Time to replace. As I was waiting for new Scorchers to come in, I tried on my old Marathons again, and WOW that was bad.
Anyway: after hearing of Jur's success I gave my remaining usable old Scorcher to a friend with a Brompton, probably 5 years old I'd guess (he bought it used). And the verdict: absolutely no way could it possibly be mounted on the back wheel, because of -- what else -- the chainstay bridge. Either they make magic Bromptons in Australia or Brompton has changed its design recently in that regard.