Originally Posted by Dave Noble

That isn't what the image posted says

It only indicates that upgrades are avaulable on BA transatlantic flights; there is nothing that indicates the ability to upgrade from Euro Traveller to Club Europe on that screen

The T&Cs also states "Upgrades are valid only on scheduled flights marketed and operated by American Airlines or American Eagle offering a First or Business Class cabin for travel, or on British Airways marketed and operated transatlantic flights. Not valid on codeshare flights, except for flights marketed by American and operated by British Airways."