COBS 6.5.2 Providing Best Execution

(a) When an Authorised Person agrees, or decides in the exercise of its discretion, to Execute any Transaction with or for a Client in an Investment, it must provide best execution.
(b) An Authorised Person provides best execution if it takes reasonable care to determine the best execution available for that Investment under the prevailing market conditions and deals at a price and other conditions which are no less advantageous to that Client.