How can we prove the quality of our service? An assertion of quality is not the same as assurance. For proof of what we can do, you just have to look at the top of this website. As you can see, we are an NSI Gold company, Safe Contractor approved and CHAS accredited. We are registered to the Camesafe Safety Certification scheme for automatic gate installations. All of our engineers hold City & Guild Qualifications in the relevant industries.