Gabbie Or

Hi, Hope you are well. To my best understanding, a property transfer by gifting would not arise any capital gain and stamp duty provided that there’s no mortgage. However, I am confused about how the capital gain tax calculated when selling it later. The property is our main residence and is jointly owned by my husband and me. He is now considering to gift his part and our house will be changed from joint ownership to sole under my name. If I sell it for the disposal of main residence after certain years. will I entitle 100% principal private residence relief as I am one of the owners from the first date of sale completion? Or I can only get a 50% relief counted from the first date of completion till the transfer complete, then 100% after the transfer date? Thanks for the reply in advance.