To opt into paying just 2% commission, simply visit the 'My Account' section of your Betfair account and select the 'Basic' rewards plan. The 2% commission rate will be applied to your account immediately and you can start making those commission savings.
The Best Price Execution feature enables customers to get matched at the best available odds on the Exchange. With the Best Price Execution feature switched on, if better odds are available, or become available, after you have placed your bet request, your bet will automatically be matched at the improved odds.