A recent topic enquiring about shunting in colliery sidings prompted me to dig out a series of sketches I made over thirty years ago on the shunting operations at Bersham Colliery, near Wrexham.  The sidings at Bersham were very compact and restricted in layout and would I think be an excellent subject for a model, either of just the colliery itself with a main line fiddle yard on each side or as an addition to a main line layout.   Sinking of the colliery began in the 1860s but proved difficu