  We briefly discuss some of the developments since the publication of the
MMHT14 parton distributions. In particular we explore the impact of recent LHC
data for $W^\pm,Z$ and $t\bar{t}$ production, and perform a preliminary new
analysis including these data. In this re-fit (which we tentatively call
`MMHT16') there are few changes of significance in the central values of the
PDFs, but some data reduce the uncertainties, mainly in the strange and valence
quark distributions. We find that an extended $\bar{d}-\bar{u}$ parametrization
only leads to minor changes, with the difference going to zero as $x \to 0$. We
comment on the determination of the photon PDF.
