No statistics being recorded regardless of stat plugin used

I’m a little puzzled by one of my sites > https://www.barnsleypennine.co.uk/

It doesn’t matter what Statistics Plugin I use, be it Counterize, Counterize II, FireStats, none of them record any visitors to the site.

I’ve installed each separately and in each case found the same issue – nothing is recorded. I know plenty of folk are visiting the site because my web host stats show page impressions and visitors.

My other three WordPress sites (on the same server but different databases) all work fine. The site I’ve an issue with and the other three have the same other plugins installed therefore I know it’s not a plugin conflict.

I have ensured that all pages are W3C clean before posting here and have turned to the plugin authors too.

Any assistance would be grateful received.