@Rachel0
I just looked up the rail easy site and I can see Walthamstow Central to Stanstead listed with information references to both train and underground.
I really just use it as an information service, if I’m having a train journey say from Edinburgh to a location elsewhere in the U.K., to find out which train company is providing what line,as after privatisation, I’ve found rail travel outwith Scotland, to the rest of the UK, tricky to join up with the best combination, compared to British Rail of old.
In Scotland it’s Scot rail, so really not the variety of rail companies down south.
So raileasy not giving up to date, info?
When I’m in Europe I tend to use Trains EU, a similar system to RailEasy.