This is a supplementary volume to the corpus of Romano-British mosaics published by the Society of Antiquaries of London between 2002 and 2010 (Volumes I-IV). It is in two parts: an overview, discussing various aspects of Romano-British mosaic study with special emphasis on recent research and discoveries, while the second part is a catalogue of new mosaic discoveries, re-excavation and new research of known pavements, in the same format as previous volumes. Volume V includes the recently discovered figurative mosaics at Ketton, Rutland, and Boxford, Berks, which are regarded as perhaps the most significant examples revealed for 60 years. Also included is the mausoleum uncovered in Southwark in 2023.The corpus is an outstanding work of scholarship which has become the standard reference work for Roman mosaics in Britain. The authors have gathered all the known sources and references to the mosaics, with many illustrated through paintings and drawings made in situ. These are works of art in their own right.