The Wessex, and the previous IV, was one of those obscure British airliners of the interwar period. Nothing fancy or advanced in these high-wing light trimotors produced in very modest number (10). They saw services mainly in the UK and abroad with SABENA.
One of its operators was the GWR Air Services. The Great Western Railway formed its own air service in 1933 and operated only for a year before it became part of the Railway Air Service. The latter was established by the British “Big Four” railway companies in collaboration with Imperial Airways to provide a sort of “feeding” services to Imperial’s international flights. A magnificent poster for such a very modern idea.