Planning a trip to London on the 4th June. I am making a short trip from West Ham to Barking to pass East Ham depot on the north side. I know the tube line passes the north end, but does the overground trains also pass the north end of the depot (I assume overground trains return on the south side single line) ? Also am considering getting the tube as have better chance of getting any westbound 357s as they won't be so close and better chance of getting the numbers (front or side). Is this the best thing to do. I also note the North London line is closed, will this effect the chance of any freight at Stratford where I intend to be at from 09.30 til about 11.00. Many thanks for your help.