Parton distributions in the LHC era: MMHT 2014 PDFs L. A. Harland-Lang, A. D. Martin, P. Motylinski and R. S. Thorne Eur. Phys. J. C, 75 5 (2015) 204 Published online: 09 May 2015 DOI: 10.1140/epjc/s10052-015-3397-6