I am, sure you are right that this is not the native bluebell. I have looked at the stamens of ours and they are different. The outer ones are attached to the petal for much of the petals length and as you say they are sweetly scented.
The website says "Separating the hybrid bluebell from the Spanish bluebell can be very difficult, even for experts. If you are unsure, have a look around you, if there are native plants nearby it's most probably the hybrid plant." I am not even an expert so after that I don't think I will even hazard a guess.
Eric H