  I present the results from the recent PDF4LHC study, and the resulting new
recommendation for combining PDFs sets for LHC calculations. In order to put
this into context I summarise continuing updates in PDFs. This includes
improvements and recent updates of particular PDF sets due to theory
improvements and a variety of new data sets, including most of the up-to-date
LHC data. I will emphasise particular issues relevant for top physics.
