Drill these with a 1mm drill bit, and fit the brackets. Pass a wire through the holes, and you'll have handrails as seen on the original Smokey Joe, and the Centenery model.
Hornby R1036 OO Gauge Smokey Joe Electric Train Set Complete VGC
Hornby R1036 Smokey Joe 00 Gauge Electric Train Set Complete Used
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*** HORNBY OO GAUGE “ SMOKEY JOE TRAIN SET “ R1036 ***
Hornby R3822 56025 'Smokey Joe' Centenary Year Limited Edition