Flow Dan (also spelled Flowdan, real name Mark Viera) is an MC from East London. He is one of the founding and longest serving members of the Roll Deep crew, after joining from UK garage collective Pay As You Go, and is also a part of the collective Cemetary Warriors. Flow Dan started as a jungle MC in the late nineties before starting Roll Deep with Wiley. While at Roll Deep he has featured on all the main singles and featured on all three major CD releases: Rules & Regulations