Here ya go then, here’s the new 3D map for Whitechapel – where there’s a new entrance/exit at the western end of the station, and then from the back of the westbound platform there’s a new corridor and steps down to the southbound Overground platforms – which look like they’re going to be a permanent addition and not a temporary one!
The new 3D map will be released in the next update to Station Master.

Whitechapel 3D