From Virgin's website/journeycheck....
Advice:
You can get real time journey updates to your mobile by visiting
www.journeycheck.com/virgintrains and registering for live travel alerts direct from our control centre or by tweeting our team @VirginTrains.
Other train operators are accepting Virgin Trains tickets so customers can take alternative routes. If you can be flexible with your journey, then ticket restrictions have been lifted so you do not have to travel on your booked train. Customers are also free to travel tomorrow instead if they wish to. All customers should expect journeys to take longer than normal and be very busy. We are sorry for the inevitable disruption and delay to your journey.
Alternative Routes:
Full ticket acceptance by other operators is in place. This includes the following: Virgin Trains East Coast and East Midlands trains are taking passengers via any reasonable route.
Arriva Wales are taking passengers between Newport South Wales and Holyhead via Chester in both directions. Chiltern Railways are taking passengers between London Marylebone and Birmingham Snow Hill in both directions. London Midland, Transpennine Express, Scotrail, Merseyrail and Cross Country are taking passengers via any reasonable route.
I'm caught up in this - booked on the 1420 to Manchester, now going to use East Coast to Doncaster &
TPE▸ to Piccadilly leaving 90 minutes earlier to achieve same time arrival. Fortunately booked First Advance, so at least stand some chance in First Class of getting a seat.