In JET, strong flows towards the inner divertor are observed in the Scrape-Off Layer (SOL) which peak just outside the separatrix [1]. It is known that flows can be driven by ionisation source imbalance, neo-classical drifts [2] and poloidal asymmetries in radial particle transport but there are quantitative and qualitative discrepancies with code predictions. Given that ion orbit losses appear to be a prime candidate for explaining the narrow power deposition profiles in JET, we address the question as to whether the coupling of momentum from these ions into the SOL can drive significant flow in the SOL.