Well good news is many of the tube lines intersect soho or very nearby and plenty of Bus routes.
Worth using google maps which will show all the tube lines and major stations.
Alaso worth looking at the TFL website as many of the major tube lines have on the outskirts of them plenty of affordable areas to rent in.
But from experience well worth ensuring you have several routes into work if possible and of course out of. Tube and Overground lines/stations often mean they are closed when required yet other routes if you know of them are totally unaffected..
