BIDB doesn't show speeds, only who covers the post code. Okay technically it says what speed it thinks they offer in that area, but I wouldn't be certain on its accuracy.
Unfortunately only Virgin Media themselves with your address details can give an accurate answer.
Think Broadband seem to have adjusted to "average" speed too, which means it shows 137Mbit for my post code, when Gigabit is available from Openreach and Virgin.