Diamond London Locksmith is rated 4.7 out of 5 in the category emergency locksmith service. Read and write reviews about Diamond London Locksmith. Diamond London Locksmith is a high-quality locksmithing service designed to offer you high quality, 24-hour emergency services that you can rely on. Our team is here to make sure that you are always 100% happy with the results and that you can deal with any locksmith emergency that you may need. We focus on both commercial and residential services, and you can rest assured that we are here to offer the ultimate value and quality in one single package. We can work with anything including emergency door openings or any other similar issues to this.