Rail pay scales 1910 to 1925

[chempat]

I have been trying to find pay rates for rail staff in the 1910's to 1920's.

On Ancestry rail records I found a book sub-labelled Great Western Drivers, Firemen and Cleaners  1841-1888  1885-1904
At page 2 of this link there are scales of payments from around 1945 onwards.  I was really hoping that the scales would start at 1885 and continue onwards.......
http://www.rootschat.com/links/01sqw/

or page 3 of this for more easy to read version
http://www.rootschat.com/links/01sqv/

Has anyone found any similar scales relating to the time period I am interested in - most rail books I have looked at do not have any tables at the front (or back).

Thanks.