Last Updated: 29 June 2026
How to convert N Gauge Union Mills Class 2F to DCC
This guide covers the following models:
- Union Mills Class 2F 58153 in BR Black
Union Mills models follow a similar tender drive arrangement. It is usually possible to fit a small decoder inside the tender, however where this is not possible, the decoder can be hidden in the cab. It is technically possible to mill out some of the metal from the tender to create space, however this reduces weight and traction.
Refer to the Union Mills J39 (old chassis) guide for the detailed step-by-step guide on installing a decoder in the cab, there isn't enough room inside the tender on this model.

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