I have published my first version of National Rail timetable website at GBTT.uk. It is probably the first site on the market which can show updated train timetables in traditional format, as an alternative to printed PDF timetables from Network Rail and train companies which are only updated half a year and without planned engineering works.
The basic function works but there are still possible improvements to it, including SEO, and the integration of real-time data alongside the timetable which haven’t been done yet.