To answer your question Nigel, this is the photo of the cross,
http://www.themodernantiquarian.com/site/1732
seems to have replaced an earlier one, there was also a lot of picnic rubbish at the site, which Megadread collected......
Did'nt realise the 'supposed cross' was on a walker's cairn come prehistoric cairn Chris, maybe its there for a different reason, did someone die up there? Wish I'd never started the thread now ;)