Important recent studies have elegantly demonstrated that geometrically constrained pnictogen systems can promote HDF, either through a series of stoichiometric steps or catalytically, via P(III)/P(V) or Bi(I)/Bi(III) redox cycling. Crucially, the three key processes of OA, ligand metathesis (LM)/transmetallation (TM), and RE that underpin many transition-metal catalytic mechanisms were seen in these systems (Scheme 1). These are remarkable demonstrations that main-group systems can mechanistically mimic the key steps in transition-metal catalysis. However, complex ligand architectures were used and these were proposed to play an important role in the observed reactivity through geometrically constraining the pnictogen. Inspired by reports of stoichiometric reactivity of simple phosphines with fluoroarenes we set out to explore whether geometric constraints are a necessary pre-requisite of redox-cycling in HDF using pnictogen catalysts. We now report that a simple catalyst system constituted from commercially available alkyl phosphines and silanes is able to perform the HDF reaction on a range aromatic substrates.