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Chains to mile conversion
[[File: SVR_Gradient_Profile.jpg|500px]]
GWR practice was to measure distances to particular locations from London Paddington via the most direct GWR route. In the SVR gradient profile, mileages between Kidderminster and Bewdley are measured from London Paddington via Birmingham Snow Hill, while mileages between Bewdley and Bridgnorth are measured from London Paddington via Oxford, Evesham and Worcester. This accounts for the change in mileage at Bewdley South Junction from 138 miles 21 chains to 137 miles 12 chains (one chain = is equal to 22 yardsor 1/80th of a mile).
The number shown is the gradient in each section (the vertical scale is exaggerated), thus on leaving Kidderminster the line initially goes downhill with a gradient of 1 in 112. ‘L’ indicates level.
