Once they've reviewed your income and expenditure, the size of your deposit and the amount you want to borrow, the broker will advise you which mortgage products are are right for your circumstances.
They'll make you aware of the interest rate, benefits (like cashback) and fees that apply to your mortgage.
Brokers usually have access to the whole market unless the lender chooses not to give them access to their products. Even then, the broker can see the details of the mortgage, but won't be able to complete the transaction for you.
To get access to these mortgages, you'll have to approach the lender directly. But there’s a risk that you’ll apply for an unsuitable or unaffordable mortgage, or that the lender rejects you, which could adversely affect your credit record.