Last thursday (27th Oct) was a cracking day so I walked up to Castercliffe. I took several pictures around the fort and on the top (there is a footpath over the top). They are, pretty much, just newer shots similar to those posted by Lordmagic.
Rather than put what appear to be random pictures onto the Burnleyweb site I've created a webpage for them.
http://www.teapothand-knits.co.uk/castercliffe.htm