>I have recently come by a Hornby carriage, blue and grey, similar to
> the 125 Intercity ones but not actually marked Intercity. It has
[quoted text clipped - 5 lines]
> TIA,
> Gordon
This sounds like one of the original Hornby Mark 2 coaches.The wheel-sets
consisted of one plastic wheel and one metal one on a common axle. On the
underside of the bogie, a flexible metal strip (phosphor bronze?) made
contact with either the axle or the back of the metal wheel. This was
connected via wires to the rivet, IIRC. One bogie collected power from one
rail, the other bogie acting as a return to the other. The metal wheels were
cheaply-made pressings which pitted and corroded easily- were you to try and
get the lights to work, it might be an idea to use some of the more recent
turned metal wheels along with p/b strip.
Brian