TS: Eurostar track gradient heights

[DoctorApple]

I have been making a route on Train Simulator; but I am stuck on the Eurostar track as I do not know the track heights/gradients, I would like to know them from St Pancras to Folkestone (or Eurostar tunnel)
Does anyone know where I can find information for this?

I have tried looking online, even tried asking a few people, nothing.

 

[Kingsbury Jn.]

http://en-gb.topographic-map.com

I am not sure where to source this information but the above site may allow you to take readings at strategic points. It may take quite a while but it is better than zilch!