On 20 Aug, 03:14, Charles Ellson wrote:
Yes, as I later mentioned in the main thread, I found that eventually
despite them cunningly omitting any mention of the phrase "North
London Line" thus partly hiding it from being Googled.

"North London Line" doesn't exist in official Overground terminology -
it's "Richmond-Stratford". And likewise for the other lines.

It would be
interesting to hear how well exposed any notices are on the NL/DC
lines having seen the words "There will be no refunds available on
existing tickets, season tickets or Travelcards.".

The posters are very common, but unfortunately say "major engineering
work that may disrupt your journey" (paraphrasing) rather than "a
huge chunk of the network will be closed". They also don't specify
details.