Reflection arrangements appear in various areas of mathematics including algebra, combinatorics, differential geometry, integrability and singularity theory. The concrete research strands within these areas that we plan to focus on include Cherednik algebras, Coxeter-Catalan combinatorics, logarithmic vector fields, Frobenius manifolds and flat invariants. The main goals of the workshop are to bring together specialists from these diverse fields, to explore remarkable connections between these areas, to enhance viewpoints and to stimulate further research. The workshop is organised in partnership with the Clay Mathematics Institute.