WHR LWB LTR Lineside Workers' Bothy Lean-to Right
Photos and videos of the WHR in the 1980s and 90s suggest that at least some of the bothies had a small lean-to shed at their north end, most likely an outisde loo, and if so, probably an earth closet.
Since the bothies were found on both sides of the track, this means that these outbuildings might be found at either end of otherwise identical buildings, so I've made left and right versions as separate add-ons as it's more economical, and they could also have wider application elsewhere.