The main reason that you may receive slower than advertised speeds is due to your site's distance from the local exchange, which is a common factor when considering broadband speeds. Another factor that can affect speeds is the amount of users on the line at one time.
Equipment onsite can also be an issue, Services such as an onsite Firewall, Server or even a toaster near the router can all cause interference
Contact us at [email protected] or 0333 202 5000 option 1 for Customer Services then option 2 for Landline and Broadband and a member of the team will be happy to assist.