If your loan involves a cashback, you may be asked to repay all the money if you redeem your loan early. Be prepared for lots of extra costs. No matter which lender you go to, someone has to go and value the property you are buying to ensure it provides suitable collateral for the loan. In most cases you will be required to pay a fee for this in advance. You will need a solicitor or trained conveyancer to handle the transfer of the property title from the vendor's into your name.
Many firms publish a fixed price scale, so it's worth shopping around.
Again, this fee is paid through your solicitor.