National Railway Museum photographs taken in Kings Cross Yard.
In effect, a long lever that would provide enough purchase between a wheel and the railway line.
Well, there's one on E-bay right now. Only trouble is it is in Wales and I'm in Settle so enquiries are in hand as to its weight. Then I can see if a courier can be found who can oblige.
Meantime, I thought you would be interested. Well, if it crops up at a quiz night you'll thank me for this broadening of your horizons.