The full size locomotive Mariloo is a 2-6-2 type locomotive with tender bogie and weighs approximately five tonnes.  The locomotive, designed by Trevor Stirland, was constructed over an 18 month period in the Exmoor Railway workshops · While seeking to portray a Victorian colonial appearance it includes much modern technology and up-to-date engineering · Mariloo is considerably more powerful than Rosemary and Naomi, Exbury’s other locomotives, and is capable of hauling heavy trains at peak times and during special events, when double heading was previously required.

She is the largest 12¼” gauge locomotive to be built at Exmoor.


The miniature locomotive is a new build by Allan Black of Black's Railway Workshop, commissioned especially for the Elmtree Line in March 2013.


Mariloo was completed in late January 2014 and since joining the Elmtree Line fleet has received additional detailing and cosmetic additions.