Thanks for your enquiry.
On the basis that the Deeds are registered at the Land Registry, you can apply on line for a copy of the Deeds. If there is a Mortgage registered, this will be shown in the Charges Register.
Here is the link- www.landregistryservices.com
On the homepage,please request "Title Register". There is a small fee payable.
I hope this answers your question and if so, I would be grateful if you could leave positive feedback.