Sorry Mark, but there aren't any.

The nearest site of any significance is the Calderstones in Liverpool:

http://www.themodernantiquarian.com/site/248

Unfortunately, they're locked up and you need to find someone willing to allow you in; I did.

The only other possibility is to try to find the ephemeral prehistoric footprints on Formby beach:

http://www.themodernantiquarian.com/site/8382

A National Trust warden told me where to look:

http://www.nationaltrust.org.uk/main/w-vh/w-visits/w-findaplace/w-formby/