Law of Property(Miscellaneous Provisions) Act 1989-
s1(2)
An instrument shall not be a deed unless-
(a) it makes clear on its face that it is intended to be a deed by the person making it....
(b) it is validly executed as a deed by a person....
section1(3)
An instrument is validly executed as a deed by a n individual if, and only if,-
(a) it is signed-
(i) by him in the presence of a witness who attests the signature or
(ii) at his direction and in his presence and the presence of two witnesses who each attest the signature.
(b) it is delivered as a deed by him or a person authorised to do so on his behalf.
In proper English that basically means go to a solicitors with and make sure that someone witnesses that you intend to make a deed for your daughter and that someone witnesses it and approves you're signature.
In short as norfolk boy says go to a solicitors with a bit of cash.