Thanks for the link the chap asking about the rail material has found out about G W Kirk Foundry and Emailed this today.
G H Kirk started in Peasholme Green 1885
S H Adams “ “ 1887
They merged in 1919 & those premises were vacated 1990
Adams was a place some of York's motorcycle racers worked at it is now offices.
There are still some parts of York's industrial past to be seen nearby such as the old metal bridge to the site of the power station cooling tower which is a nature reserve by the side of the river Foss.
The power station chimney near Morrisons is still there fortunately Morrisons was not allowed to put their name on it.
Paul