  We describe the inclusion of the photon as an additional component of the
proton's Parton Distribution Functions (PDFs) in the MMHT framework. The input
for the photon is adopted from the recent LUXqed determination. We describe the
similarities and differences above the input scale with other photon PDF
determinations and the contributions to the MMHT photon from both leading twist
and higher twist contributions, and their uncertainties. We study the impact of
QED effects on the quark and gluon PDFs and the fit quality, and outline our
development of an equivalent set of neutron PDFs.
