Under the Freedom of Information Act, enthusiast Gordon Lacy requested a copy of the Working Timetables for the East Coast Main Line. As East Coast is a government-owned company, they had to oblige, and sent him six PDF files (SX, SO and SUN for London - Edinburgh and for Scotland), although they only show EC trains and none of any other TOC or FOC.
I'm not particularly interested but I'm sure that some people are. In particular it does list timings for every passing station (which I suppose could be useful for spotting), as well as what stock is used on each service.
Any opinions expressed are purely mine and not that of any employer, past or present.