What would be your best advise for changing your main domain to a sub domain? Are site used to be example.co.uk but has now changed to https://secure.example.co.uk/. Any example.co.uk url's re-direct to the new secure domain.

Effectively the example.co.uk is now just there to redirect any links and is no longer part of the sites url structure.

I have added a new domain to Google Webmaster https://secure.example.co.uk/ and added the site map. Waiting for it to be indexed.

Is there anything else you would advise and will this take away a lot of the juice from all the links I developed for example.co.uk?

Guessing this is not best practise as I have struggled to find any information online based on this subject.