Working Group Report on the Structure of the Proton

We summarize the developments on the structure of the proton that were studied at the Workshop on "HERA Physics" that was held in Durham in September 1995. We survey the latest structure function data; we overview the QCD interpretations of the measurements of the structure functions and of final state processes; we discuss charm production and the spin properties of the proton.Comment: 45 pages, latex file using epsfig and ioplppt macros. Figures included, but full resolution figure files and postscript file of the whole paper are available via anonymous ftp at ftp://cpt1.dur.ac.uk/pub/preprints/dtp96/dtp962