Blister I and Blister II

Blister I and Blister II are small twin diesels that have not appeared in the Railway Series, but are mentioned in "The Island of Sodor: Its People, History and Railways".

Not much is known about them, apart from the fact they have regular engine troubles and are particularly difficult to start - which is how they got their names. This is based on the trouble experienced with the Muir-Hill Fordson granite tractors that worked at Ravenglass until 1953 on stone traffic.

Blister I and II are painted black with black and yellow stripes around their faces, and are #6 and 7 on the Arlesdale Railway respectively. They are based on the Ravenglass and Eskdale Railway's Lister diesel "Cyril".