thanks. Been a little sick here, apologies for moving slowly.
Found this:
http://stackoverflow.com/questions/37403731/this-page-didnt-load-google-maps-correctly-see-the-javascript-console-for-tech
Quote: ....Google recently changed the terms of use of its Google Maps APIs; if you were already using them on a website (different from localhost) prior to June 22nd, 2016, nothing will change for you; otherwise, you will get the aforementioned issue and need an API key in order to fix your error. The free API key is valid up to 25,000 map loads per day......
So it seams like we need to update the Time Map module to allow for the input of a google API key.
We'll get that sorted and released.