Narrow Gauge in 3mm.

 More of Daves stock which has mainly been built from brass etches or as Allan of Worsley Works puts it 'Scratch Aid'.
The Donegall railcar is articulated and powered by an N gauge mechanism, a diesel motor bogie.
Worsley Works have quite a selection of Irish Narrow Gauge kits from several railway companies.
It is well worth while to give the list a visit as it is surprising the range and number of scales represented.
 http://www.worsleyworks.co.uk/