Planned engineering works

[Carless7]

I want to travel from Crewe to Euston on Sat 25th March, using London Northwestern or WMT. As per screen shot, two of the trains seem to have planned engineering works but not confirmed yet, and the 13.12 doesn’t, or at least I don’t think it does. Are these via different routes hence some might have planned works and others not? Thank you

 

[Kite159]

Is that more down to Avanti not releasing advance fares for that day rather than engineering works?