How to Convert Union Mills B12 86721 to DCC

This guide covers the following models:

• Union Mills Class B12 86721 in LNER Green

All Union Mills models follow a similar tender drive arrangement. It is usually possible to fit a small decoder inside the tender, however this is not always the case. A decoder may be hidden in the cab, or some material can be milled out from the tender to create space.

Union Mills Tender Drive Conversion

Refer to the Union Mills T9 guide for the detailed step-by-step guide on installing a decoder in the tender, which requires a small decoder.