As an internet-based business, first impressions of Modern UPVC Windows are determined by your website user's experience. As a site user, I am seeking, in essence, to 'design' a thermal element in compliance with Part L, to know how much it will cost and to have a visual indication/presentation of what it will look like. You therefore need to put yourself in my position and consider how your website can better support me in the attainment of my goals. For example, a summary of all pertinent information that may facilitate sign-off by a building control officer. In a nutshell, you need to determine what your users are seeking to do (e.g. design, cost, present, procure, fit and sign off a thermal element) and then develop your site such that it supports the user to attain their goals. If you have different categories of users and/or sets of goals, you may wish to consider tailoring your site to accord with the user's situation. Modern UPVC Windows may then become the first UPVC window manufacturer with a 'smart' user-focused website. One which may enable and support the user to increase their productivity in partnership with you!