Tyler agreed to this arrangement , and to this day all carriages on the Talyllyn have doors on one side only , an unusual feature for a public railway . This feature is however shared with the neighbouring Corris Railway , though for different reasons . Tyler agreed to this arrangement , and to this day all carriages on the Talyllyn have doors on one side only , an unusual feature for a public railway which is shared ( albeit for different reasons ) with the neighbouring Corris Railway .