Complaint regarding the conduct of a black African security guard who is employed at the Sutton High street branch in Surrey. There are two cases that I would like to inform you about which I am disgusted with. The first case is my mother, a black Caribbean women who at the age of 76 years old who is still able to be independent and shop on her own when myself (her daughter ) is not always available. My mother is a loyal customer and was shoping at this store when it was known as "Safeway". When my mother was stopped by this particular security guard because she walked back through the entrance barrier, she was approached by this particular security personnel and the following occurred: 1) She was told off for going back through the entrance barrier she had come in. 2) She was asked if she had actually bought anything from the store. 3) She was asked to open her bag so that he could look inside. My mother said that she felt humiliated and forced by the Morrison's employee.Initially, she was in shock, as she could not believe what was going on. The mannerism of this security personnel and how he went about the situation, was not professional and very uncouth. Am I to believe that Morrison's security personnel are informed and encouraged to “take chances” in stopping suspicious customers, even if it means intercepting innocent people? Sutton is still a predominately white borough and has only changed in the last 5 years in regards to developing into a multicultural area and I have lived in Sutton for the last 47 years. I do believe that the security guard is "racially profiling" customers, whether he is instructed to do so by such a big company or whether he is working off of his own perception. This leads on to another case that I was witness to at the same store. I stood by the entrance gate, with my mother and another black customer and witnessed this same security personnel stop a young black boy by the salad bar on his way out. He made the young black man place his bags on the floor, remove the items and then asked him to show his receipt as proof of purchase. It actual turned out that the young man had actually purchased the items, he was accused of stealing. The incident was embarrassing, and humiliating for the young black man as the security personnel was not even discreet about his actions and could have lead the boy to his security room situated near the customer services desk. In the end the security personnel had to let the young black boy go, and apologise as well.In that time 20 non ethnic customers could have walked through that door with stolen items. There was no respect and no discretion. The security personal was asked by myself, my mother and the other black customer who were on lookers after the event, as to why he had to conduct himself in such a way. When he approached us, we were informed that "January is the month that customers steal the most". I did try to approach him regarding his unprofessional conduct towards my 75 year old mother the previous week, but he just walked off and dismissed us with his hand.In both of these instances I find that his actions are particularly troublesome. I hope as a retail store you take matters like this seriously and do not tolerate discrimination of any kind. I accept that stores have to check for shoplifting, but the guard's actions were discriminatory and humiliating. I am aware that retailers are within their rights to stop and question customers they suspect are stealing, but they should have proper grounds for doing so. I also understand that Individuals working in the private security industry have to be qualified and licensed by the regulator, the Security Industry Authority, which has powers to disqualify any who fall foul of its licence standards. Is this particular personnel qualified and licensed?I am appalled and I want something done about this matter but customer services stated nothing could be done.