Crag features

One word - ESOTERIC - goes a long way to describe this crag. Spireslack is a former opencast coal mine. The mining has exposed a limestone pavement canted up to a slope of around 40 degrees, 50m tall and over a width of some 750m. This limestone layer is around 1m thick and overlays strata of very soft rock. Gravity does a good job of locking the limestone together into vast slabs of stable rock. At the margins however, there is instability and potential for rock fall.  The climbing is technically very easy due to the shallow angle but a lack of protection opportunities will make potential routes a tad (your mileage may vary) bold as a lead, or more realistically as a solo. Reliable footwork will be required to compensate for few useable handholds.  There are only limited suitable anchors for belays up top. Placing stakes as anchors would likely be required for most lines. If top-roping, consideration should be given to loose stones at the top of the cliff. If not cleared beforehand, these may pose a risk of being brushed onto a climber below.