Watching the Defectives: Guido "Scoop" on Lab -> Lib Flight

Apart from a relatively lovely, by S&M standards, cartoon ridiculing the unintentionally (?) extraordinarily disloyal to the workers muppet Charles Clarke ... Guido has an authoritative comment suggesting a Labour to Lib Dem MP defection over the weekend. Some suggestion of Frank Field being the one. Though he always seemed more of a to-Tory flight risk to me. Incredibly naive. Often precise yet inaccurate. Other nominees?