Owning your own home

All depends what agreement you come to with the adviser before you get detailed advice.

From the FCA:

A mortgage adviser or broker also has to tell you their charges and
how they are paid, which could be:

• a flat rate for their service
  
• an hourly rate, though they must tell you what the rate is and what might affect the number of hours they spend on your application
  
• a percentage of the amount you borrow for your mortgage
  
• a commission payment from the mortgage lender
  

Advisers I know both personally and professionally go with sommat along the lines of;
"My time is charged by the half day, but should you complete on a deal I facilitate my rate is waived and I will be remunerated through lender commission."