This service is just added as a reference in page's headers, so we can use it to publish/edit blog posts from external applications like LiveWriter. However currently we are developing "Sitefinity Desktop Application
" to update Sitefinity content for better experience.
This service will not break any part of your site. However it is strange that it searches your old site as authentication point. Are you sure you replaced all "2013.valpak.co.uk" references with the new one?
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items