Cloner not able to copy images

Hi guys!

Since moving hosts (new whm servers, clustered DNS) our mu installation isn't able to copy any images when cloning .

Here is the on screen log from one we tried to clone;

We're setting up your new blog. Please wait...
Settings Copied
Widgets Copied
No posts to copy
Pages Copied
Custom Post Types Copied
Terms Copied
bottom Menu Copied
Main Menu Copied
Users Copied
Comments Copied
Remote server did not respond for file: http://domain.uk/wp-content/uploads/sites/49/2015/11/facebook-header-e1446559504693.jpg
Remote server did not respond for file: http://domain.uk/wp-content/uploads/sites/49/2015/10/cash-for-cloud-nine-hair-straighteners-e1446559265391.jpg
Remote server did not respond for file: http://domain.uk/wp-content/uploads/sites/49/2015/10/snapped-e1446557891329.jpg
Remote server did not respond for file: http://domain.uk/wp-content/uploads/sites/49/2015/10/platechip.jpg
Remote server did not respond for file: http://locul.uk/wp-content/uploads/sites/49/2015/10/plate2.jpg
Remote server did not respond for file: http://domain.uk/wp-content/uploads/sites/49/2015/10/plate1.jpg

I exported content from an old wordpress site on a different server, and imported those into a MU site and that copied images and worked fine, it seems to be when copying from sites on the same MU installation.

Any help would be much appreciated.