Poeta Anglicus

The gloss on the Prooemium to the *Constitutions of Clement V.*, col. iv. "Corp. Jur. Can." t. iii. Lugd. 1671, has the following remark:— "Et dicitur a *Papæ*, quod est, interjectio admirantis, et vere admirabilis: quia vices Dei in terris gerit. Inde dixit ille Anglicus in poetria nova: *Papa stupor mundi.* Et circa fin., *Qui maxima rerum, nec Deus es nec homo, quasi neuter es inter utrumque*." Who is the Anglicus Poeta? What is the name of his poem?