I am working on a website whose domain is 10 years old with good quality backlinks. The On-Page of the overall site is also fine, but the keyword are not ranking well. The site used to rank on 3-4th page (google.co.uk) on our main keyword. But now its now even in top 100. I also checked competitors backlink. The backlink profile is very weak as compared to my website. Can anybody tell what exactly may be the problem? Here is the sitelink: www.nationwide-mobility.co.uk