The LT&SR tank was banned from Fenchurch Street by the GER and the LT&SR was taken over before the locomotive was ready for service, by the Midland. It was designed for a specific task, moving heavy seasonal passenger trains on a fairly short line for which it would be ideal (on paper at least). Inter company rivalry had a lot to do with it, the GER being miffed by the Midland take over of the LT&SR in 'their' territory.