Hi

Thanks for your reply Leonid. Im still building our network and haven't got messanger up and running yet.  

I looked at the page you recomended,, if you click on the Maps javascript maps API link on the left of that page ( https://developers.google.com/maps/documentation/javascript/tutorial ) you'll see in their demo that the correct link is the one I included in my previous post: 

script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap"
    async defer

Kind regards

Mark