Execution only share dealing is where a broker purely executes an investors buy or sell instructions, rather than providing any investment advice to that investor or acting on the investors behalf based on granted authority.
Most private investors use execution only investment platforms as opposed to advisory brokers (who provide advice) or discretionary brokers (who act on your behalf), both of which feature higher costs. Examples of execution only investment platforms are Hargreaves Lansdown, AJ Bell YouInvest, Interactive Investor and Fidelity. If you are looking for an execution only share dealing platform, read our cost comparison articles covering the best platforms for shares/ETFs and funds.
Many advisory brokers also provide discretionary broker services, though there is little overlap between brokers who provide execution only services. Examples of brokers who provide both advisory and discretionary broking include Cannacord and Investec.
The London Stock Exchange official website features a full list of each type of broker here.