Parton distributions from LHC, HERA, Tevatron and fixed target data: MSHT20 PDFs S. Bailey, T. Cridge, L. A. Harland-Lang, A. D. Martin and R. S. Thorne Eur. Phys. J. C, 81 4 (2021) 341 Published online: 21 April 2021 DOI: 10.1140/epjc/s10052-021-09057-0