While searching for track gradient diagrams I came across this http://www.networkrail.co.uk/browse documents/rules of the route/tpryearyy/lnwyyp.pdf Not sure if anyone would find it of any use but its all about timetable planning rules.
Edit: Also found this http://www.networkrail.co.uk/aspx/10563.aspx Take a look at the pdf files on the right hand side of the page.
Edit: Also found this http://www.networkrail.co.uk/aspx/10563.aspx Take a look at the pdf files on the right hand side of the page.
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