I am like you, OP. I order the VLML and they have, in the past, brought me a veggie afternoon tea option. They typically offer the same main meal as the one marked as vegetarian on the main menu, but I have also had an option that is different.
Unlike BA, it’s not a huge problem for them to pivot from the special meal to the menu option. Just ask them what the special meal is when you are ordering your first drink.