CuFeO2 is a geometrically frustrated triangular lattice system. At low temperatures it shows a number of different spin orders with applied magnetic field. CuFeO2 also has a ferroelectric phase when a magnetic field between 7 and 13 T is applied at low temperatures. The structural transition present in CuFeO2 does not remove the centre of inversion in the unit cell so is not enough to allow ferroelectricity to emerge. It is thought that the ferroelectricity is coupled to the transition to a non-collinear incommensurate spin order. The WISH neutron Powder diffraction instrument with its high magnetic field capabilities will allow us to enter this ferroelectric phase and identify the magnetic and structural bragg peaks from the underlying spin order. This will solve the origin of the ferroelectricity in this system