. . . some punctuation might help too!
However the very first thing to do is to check the all-important vital fact for yourself. Download a copy of the title register for the property from here:
https://eservices.landregistry.gov.uk/eservices/FindAProperty/view/QuickEnquiryInit.do
Look for the following wording on the title register:
"No disposition by a sole proprietor of the registered estate (except a trust corporation) under which capital money arises is to be registered unless authorised by an order of the court"
You're hoping NOT to see that wording. As long as it's not there you and your partner were joint tenants and you now automatically own the whole of the property (with no 'transfer' necessary).
If the wording DOES appear then you were tenants in common and the executors of your partner's will MUST give his share of the house to whomever he left it to unless you reach an agreement with them to buy that share of the house so that the beneficiary can receive the money without needing to force a sale.