I'm a little surprised that it looks like they won't stretch this out to an extra summer of gigs, as they'd go down phenomenally at festivals and summer concert series (and it's an easy couple of months of mainly weekend work) doing a tight greatest hits set. The ITV special would've been a perfect time to put something on sale. Fair play to them for sticking to their guns, I guess.
No idea if anything was in the pipeline, but I'm sure if it were, Liam's passing has halted plans and totally understandable.