I always thought they would use the GE mainline for Romford rather than Chingford or Tottenham Hale into London. Depending where they live in Essex i guess, whatever is easiest at the time.
I dont miss that line at all having worked it. Plagued with Chavs over there and Vandalism is rife. I used to dread working the Turkey Street school run. The little darlings would open the doors and pull the Communication chords. It was bad enough to going to Enfield anytime of the day. Now i work a route cross country and have a Guard. Every train should have Guards! rant over.....
