1. There is no difficulty with separating off this separate annexe into its own folio in the Land Registry. Here I would suggest you get the assistance of a solicitor and get them to divide up the current folio into its two constituent parts. The solicitor will probably cost £350 but will be well worthwhile as they will know what they are doing. Be sure to get a quote in advance and agree a fee. But there is no difficulty in getting the land Folio split into two. This is a straightforward application to the Land Registry to create a new folio. To ensure this new folio is not sold off separately, you might consider registering a burden against the folio preventing its assignment without your consent. This is how you safeguard your own position.
Thank you very much, if the remainder of the property ie the 5 acres and original house is sold by myself, can the annexe house and its 1 acre remain legally for her to live in?