I reckon (pure conjecture here) that they will release some European tour sets similar to Helsinki before any more touring, and use the 2nd London set material as the basis for a future (North America/Japan/elsewhere?) tour. Although I think some sections from near the start of that set popped up on some bootlegs, the bulk did not, and I get the impression that most of the European tour was based around the same material as Helsinki. Which leads me to believe they are saving the material from the 2nd London set for something else.
If I'm right I won't get to relive the 2nd London set anytime soon 😢. I really hope I do get to hear that soundboard someday though, it was a real treat.