UK Property 32 - Private use Adjustment
Personal expenses aren't allowable as a deduction so if you have previously included any amounts that were not wholly for the property rental business, enter the private proportion here.
For example, if you let a property for only 8 months in a year and you use it yourself for the other 4 months, you could put the full annual cost of insuring the property in 'Rent, rates, insurance, ground rents, and then enter the 4 months non-business costs here.