Stupid question but is it still going ahead? Even with everything still going on?
Britain is pretty much open at this point in time. Of course anything can happen in the next few weeks but it is highly likely the UK leg of the tour will go ahead. People have started to receive physical tickets in the post. The USA looks promising too.
What may well happen is that concert-goers could be required to prove they're fully covid vaccinated or have a recent negative covid test.
Regarding For Absent Friends, in the Prog magazine interview early last year they laughed off the idea that it might be played. White Mountain is an outsider but it's just about possible. They've poo-pooed the idea of dusting off The Knife (Prog interview again)