There is no legal reason why you cannot DiY on this BUT I am going to be frank with you: do yourself a favour and get a solicitor to do it. Expect to pay about £300 plus vat. Shop around for a price. You need to sign forms TR1 and AP1 and submit to Land Registry with ID1 which needs photo certifying by solicitor. The lender needs to join in the transfer.
Seriously, if you don’t want grief, don’t DiY
Can I help further?
Please don't forget to positively rate my answer service (even if it was not what you want to hear). If you don't rate it positively, then the site keep your deposit and I get 0 for my time. It is imperative that you give my answer a positive rating. I t doesn’t give me, “a pat on the head”, “good boy” (like ebay), it is my livelihood! If in ratings you feel that you expected more or it only helped a little, please ask.