Do you mean that these directions are incorrect?
https://www.openstreetmap.org/directions?engine=fossgis_osrm_foot&route=51.452416%2C-0.982936%3B51.452738%2C-0.982094

If yes, this is expected behavior for OSRM and GraphHopper: “Fox Talbot Close” is tagged as private and ignored by these two routers for bicycle/foot routing. And “Epping Close” happens to be closer to the destination than “Baker Street”.

Valhalla does route the correct way:
https://www.openstreetmap.org/directions?engine=fossgis_valhalla_foot&route=51.452416%2C-0.982936%3B51.452738%2C-0.982094#map=19/51.452771/-0.982559

You might consider changing “Fox Talbot Close” to access=destination (and also set access=destination on the gate), but ONLY if the public can enter for a visit.