damousey thank you! this sounds like it is exactly what I require. will update how I get on... I wouldn't even mind having to manually edit the html file each time....
*thinking* about this though; this could surely be an 'option' in construct 2 when exporting? 
Ashley or 
Tom?
Ideally, you'd want construct 2 / (or 3 even) to handle version number increases with major versions perhaps resetting the cache automatically as per above?