  The recent BICEP2 measurements of B-modes indicate a large tensor-to-scalar
ratio in inflationary cosmology, which points towards trans-Planckian evolution
of the inflaton. We propose possible string-theory realizations thereof.
Schemes for natural and axion monodromy inflation are presented in the
framework of the type IIB large volume scenario. The inflaton in both cases is
given by the universal axion and its potential is generated at subleading order
by F-terms. Our models are shown to feature a natural mechanism for inflaton
decay into predominantly Standard Model particles.
