The first UK iPhones have arrived in the hands of journalists, who have reported that the devices are running a new version of the iPhone software — v1.1.2 — that disables jailbreak processes known to work on software version 1.1.1. According to T3, the new software closes the TIFF exploit found in software version 1.1.1 that is used to enable installation of third-party applications on the iPhone. Currently found only on UK iPhone models,…