I know similar questions to this have been asked before so no stick please 
If I am returning on the Highland Chieftain to Kings Cross (1555) and have an Advance ticket with EMT at say 1625 from St Pancras, if the Chieftain is late and I miss my northbound EMT, can I get my ECML ticket signed which will allow me to travel on a later EMT?
Or do I have to purchase a Full price open ticket with EMT?
I have already booked Kings Cross-Inverness return, now I need to see what ticket to book from St Pancras to leicester, if the penalty is too great I will just book an 'anytime' ticket.
TIA

If I am returning on the Highland Chieftain to Kings Cross (1555) and have an Advance ticket with EMT at say 1625 from St Pancras, if the Chieftain is late and I miss my northbound EMT, can I get my ECML ticket signed which will allow me to travel on a later EMT?
Or do I have to purchase a Full price open ticket with EMT?
I have already booked Kings Cross-Inverness return, now I need to see what ticket to book from St Pancras to leicester, if the penalty is too great I will just book an 'anytime' ticket.
TIA