The train goes to a yard off High Speed One (built to the standard European UIC GC gauge) rather than anywhere on the domestic network. It won't be double-stack

The train goes to a yard off High Speed One (built to the standard European UIC GC gauge) rather than anywhere on the domestic network. It won't be double-stacked anyway, as the structure gauge through Europe is too small for that to be possible. It'll be single-stacked 9'6" boxes on standard wagons.