Does anyone know why SWR WiFi on their 158's and 159's is SO much better than on any of their other units and also so much better than GWR, given they are both First run companies? Also, why can't all train WiFi be the standard of that on SWR diesel stock, as it works amazingly even in rural Devon, Somerset and Wiltshire and in tunnels. Unlike GWR that dies each time even a bird flies past the train.