I can't find your email address on your page here. It was more than fifteen years ago. Twenty five or thirty years, more like.
Toothills is completely fragile. The people that live nearby depend on the field as a lovely green space. It has three different Neolithic monument types and so is internationally important.
I took the boss of Bolton Museum there in 2003. He couldn't understand the long barrow but flipped his wig at the sight of the oval barrow. Then he buried it - who knows why? At around the same time another old Bolton man had uncovered an ancient Egyptian statue and the museum pounced on it. (The rest is history).
I wondered who'd watched the video last night. My tiny website is 'myname dot com' and there is more material on the download page. The safe email for me is info at there. Also please have a look at the Bolton's Lost Shepherd's Cross video on YT. It's crap but a framework for local historians.
I have an adversarial relationship with the Woodland Trust, who are destroying Smithills ancient monuments steadily. My next video will probably be Bolton's Lost Cursus, about a month away.