CGT on cessation of business

I am a commercial property landlord. I have always rented the property on a commercial lease. In 2023 i ceased letting the property following a surrender of the lease by operation of law. I then moved into the property for my own domestic purposes. Do I need to calculate the gain on the day i stopped leasing the property as in https://www.gov.uk/hmrc-internal-manuals/business-income-manual/bim80500

Hi John
This forum is for general queries only and is intended to help you self-serve. Unfortunately, we are unable to provide specific advice tailored to individual circumstances or offer any interpretation of the guidance. 
Customers with more complex enquiries often engage the services of a professional advisor or accountant and this may be something you wish to consider.
Thank you.