Re: Uk tour dates?
It could just be the German dates. As I said in the other topic, it seems likely that Rock AM/IM outbid Hurricane/Southside for the 2018 Germany festival slot, so if Hurr/South really wanted them they may have just put an offer on the table FF can't refuse, even when they weren't planning to be on tour. But other festivals may not want to splash that cash.
A bit like in 2004, a couple of festivals paid for them to play but other than those (plus some small warm up shows) and the John Kerry rallies, they didn't play anything else in that off-tour year.