Planning a journey from Brimsdown station, I’m told I should be able to walk about 1.5Km in 5 minutes.
5 minutes is the time that a train takes to get from Brimsdown to Enfield Lock. On foot it would be something like 25-35 minutes. And no, there isn’t a train at 09:42.
Curiously, if you ask for a walking route between the two stations, it uses a different route and gets it right: