So the webroot sync didn't seem to work however i uploaded it directly in S3 and that worked. The favicon is for some reason not there in S3 so I uploaded that - and that didn't work. There needs to be proper documentation for this as I am just shooting in the dark....
I have also updated the favicon.ico
I cleared both the global cache, my browser cache and my S3 cache.
However I still see the default cover.jpg image and the default favicon.ico.
I just checked in AWS S3 and the default images are still there - so I am trying a webroot sync.