It was only a couple of weeks ago when I suggested that the age of the iOS jailbreak was coming to an end. But then, last week, a Google researcher revealed how an exploit in iOS 11.1 could be used to create a new tool for side-loading "unauthorised" apps to an iOS device. Apple promptly released a patch for that in iOS 11.2 (and then 11.2.1 to deal with a HomeKit vulnerability). But it seems Apple hasn't plugged all the jailbreakable holes.