Whether you are a buyer, seller or both, in most cases you will want to hire a solicitor or licensed conveyancer as it can be complicated process.

If you have an existing relationship with a solicititors then yu may want to employ them. Alternatively, brokerages and lenders often have a relationship with solicitors that they are used to working with. These referred conveyancers will often pay the brokers a referral fee for sending the busines their way.

If you are confident shopping around then

Conveyancing Fee
A fee charge by a solicitor or licensed conveyancer for arranging the necessary legal work in transferring the ownership of a property. The total cost of the legal work also includes profit cost, stamp duty, land registry fees and disbursements. See fee, arrangement fee, fees added to loan, booking fee, land registry fees, IGP, stamp duty and valuation fee.