Established in 1988 and based in Grantham, Lincolnshire-  A1 Security, take pride in being a reliable and trusted provider of security services locally and beyond. Our team of experienced and friendly professionals are carefully selected to ensure that we deliver the highest level of service to our clients. From mobile patrols to static guards, alarm response, and keyholding, we have the skills and expertise to keep you and your property safe and secure.