A step change in GWR open wagon design occurred in 1902 when a fifth plank was added to its four-plank design. The five-plank became the GWR’s standard wagon design and, essentially, variations on the post-1904 version with a 3ft 3in deep and 8ft body continued to be built well into the 1940s.

Having already produced a GWR four-plank open, we thought that we really ought to offer some of its five-plank cousins too: the Diagram O11 and the Diagram O15.

Both were introduced in 1911 and are virtually identical: they have a 10t carrying capacity and use a 16ft underframe with GWR self-contained buffers. However, the O11 was unfitted whereas the O15 had vacuum brakes.


The GWR built 10,815 O11s between 1911-1919 and 2,105 O15s up to 1922. As records are few and far between, it’s not known exactly when the last of these wagons were withdrawn as they slowly disappeared over the years but they last well into BR days. Several O11s survive, including vehicles based at Didcot and the Avon and Severn Valley Railways.


Our wagons have been designed in the UK. They feature full external, internal and underframe details. They also come supplied with parts to fit the Williams patent sheet supporter. We’ve included enough parts to either model the sheet rail in the up position or ‘at rest’.

Order your model now by clicking on the item below:

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