Hope this is relevant to the thread, apologies if not. I notice in the e-timetable downloaded from Network Rail the East Coast Train services (commencing 25th October 2021) are shown on Table 26, for example a 05:45 from London Kings Cross calling at Stevenage, Newcastle, Morpeth, and arrives Edinburgh at 10:10. A further example leaves Edinburgh at 16:12 and arrives London Kings Cross at 20:47 with the intermediate calls of Morpeth, Newcastle and Stevenage. I noticed the 16:00 Edinburgh to London Kings Cross takes 25 mins longer arriving in London at 21:00