  Electroweak corrections to hadron collider processes become relevant at the
level of precision reached by present-day LHC experiments. We provide a
preliminary discussion of the impact of electroweak corrections to parton
distributions, concentrating on electrodynamics corrections to parton evolution
equations, and showing a preliminary assessment of their impact. Furthermore,
we determine the parton distribution function of the photon from deep inelastic
scattering data using the NNPDF methodology.
