The title in question is the upcoming Day of the Diesels special which is the first Thomas story to hit the UK Blu Ray market.
The release will come in the usual DVD/Blu Ray Combo and will be available the same day as the DVD version.
hmv.com, Play.com and Hit Store UK's Thomas & Friends minisite have all listed the forthcoming product attraction.
Day of the Diesels hits UK Blu Ray and DVD shelves on September 26th 2011.
Thanks to SI3DFilms and StanleySpencerSilverZ for the alerts.