Hi,
PIM2120 means to show the differences between capital and revenue expenditure, which means in terms of the statement quoted regarding capital expenditure, it touches upon such expenses as legal fees when purchasing the property, whereas the expense you have incurred for Agents commission could be deemed as a revenue expense as it was incurred wholly and exclusively for the rental business.
Other expenses such as costs for drawing up the lease and viewings would be deductible, however, surveyors costs in the sense of purchasing the property would be non-deductible as this would be a capital expense.
The latter may be claimed later if/once the proeprty is sold within Capital gains expenses.
Thank you.