The 'Outer Mode' is one of the MHD modes which limits the fusion performance of the hot-ion H-mode discharges in JET. Previously it was proposed that the outer mode is a non-linearly saturated external kink mode. This was based on the localisation of the perturbation close to the edge as observed in the Soft X-ray (SXR), the electron temperature and the electron density measurements. Also, MHD stability calculations showed that the plasma edge is close to the ideal external kink stability boundary at the time when the outer mode is observed. In this paper, we compare the SXR data of the outer mode with predictions based on the mode structure of the ideal n=1 external kink mode. Excellent agreement is found confirming the identification of the outer mode as an external kink mode.