Dream Catcher

I always enjoy seeing this mural (one of a pair) when I walk across the Sussex Way rail bridge.
Duncombe School London 30m->
<-Ecole St Denis Paris 457km
I wonder whether the children from each of the schools visit each other via Eurostar? This is a bridge over the London Overground Gospel Oak to Barking rail line though.
The train does seem to have a rather odd relationship with the rails...