Upper Class menu - Vegetarian Option.

Hi,
My partner and I are flying with Virgin for the first time in December from LHR to SFO and back. On Virgins website in the Upper Class meal service sample food menu it states "Choose from three main courses, including a vegetarian option".
In the past on other airlines if I've ordered a vegetarian meal 9 times out of 10 it turns out to be a Vegan meal instead.
My question is for those of you in the know, is there always a vegetarian option available on board as the website suggests or in reality is it better to pre-book a vegetarian meal to be sure and just hope it doesn't turn out to be a vegan meal instead?
Many thanks.
AlphaEcho.
My partner and I are flying with Virgin for the first time in December from LHR to SFO and back. On Virgins website in the Upper Class meal service sample food menu it states "Choose from three main courses, including a vegetarian option".
In the past on other airlines if I've ordered a vegetarian meal 9 times out of 10 it turns out to be a Vegan meal instead.
My question is for those of you in the know, is there always a vegetarian option available on board as the website suggests or in reality is it better to pre-book a vegetarian meal to be sure and just hope it doesn't turn out to be a vegan meal instead?
Many thanks.
AlphaEcho.