No worries. Just make sure you get the appropriate advice especially if there is any chance of the father going bankrupt or if there could be any effect on the father's estate if he was to pass away shortly.
You could check with the Citizens Advice Bureau, see if they can assist you. As a solicitor I'd probably charge �150.00 plus VAT for the works then there would be the LR fees etc... on top. LR fee would be �40 for a nil value transfer.
As regards SDLT, a nil value transfer is exempt so would need to self certify on an SDLT 60.
If registered, the form you would need is TR1 which is downloadable from the Land Registry website.
http://www.landregistry.gov.uk/assets/library/ documents/tr1.pdf
You will need to put the correct clauses in for signing. If private individuals...
EXECUTED AS A DEED BY
(NAME)
in the presence of:
Each signature must be witnessed by an independant (ie not family) witness over the age of 18 who also states their full name and address.
Good luck!