“Calder Security is very organised, well priced and very quick at making sure they fit in with what the customer wants. Every year they phone me up about a month before, to remind me that our alarm is due for a service. This is a great service as you can imagine it’s not always easy to remember! I would particularly like to say a big thank you to the engineer, Chris Lavell, who I know is very knowledgeable and can tell me if everything is as it should be or advise me otherwise. I would not hesitate to recommend Calder Security to anyone. Their knowledge and service is second to none.”