I have just had a look on National Rail to notice that East Coast have a amended timetable for tomorrow. I am travelling from Leeds to London Kings Cross then from London Euston to Stockport all of this is on advanced tickets, I gave myself 1 hour to transfer through London but looking at amended timetable it will only give me 15 minutes! Will that be enough? What will happen if i don't get my connection because it will be East Coast's fault not mine? I booked the tickets over 2 months ago!
What was your original itinerary?
Would you prefer to leave Leeds earlier so that you can arrive on time, or would you prefer to leave Leeds no earlier than your booked time, and are happy to arrive late but are concerned about ticket acceptance?
Providing your original plans allowed at least the minimum interchange time to cross London, which in this case you certainly did, then you have nothing to worry about in terms of ticket acceptance.
In times of major disruption, an alternative route
may be offered, for example in this case you
might be asked to travel Leeds - Manchester - Stockport.