You can upgrade on your new train. Please keep in mind that upgrades aren't eligible to be swapped so if you upgraded on your original service, you won't be able to transfer this to your new train.
Train Ticket: train cancelled and couldn't travel? Find out about refunds here
Upgrades: Train cancelled and couldn't use the upgrade? Apply for a refund here
You can upgrade on your new train. Please keep in mind that upgrades aren't eligible to be swapped so if you upgraded on your original service, you won't be able to transfer this to your new train.