text: If the share is quoted on the main London Stock Exchange market one broker will have been assigned to act as the Market Maker.  That means that they are given preferential trading rights and in return they agree to act as a buyer when someone else wants to sell and the seller when someone else wants to buy.\n\nYou can't guarantee the price you will receive but there will always be someone there to buy them.  As the last resort the Market Maker has to buy them off you.