I first wrote this 2 years ago to the day. Was reminded of it by a reader's email. I still don't want them in my garden but in other gardens nearby, and, of course, in woodlands they are nice. See 2 recent photos at the end.
I thought it was about time to research what kind of bluebells I've got, as I've got so many! Every time I look in the garden I see more and I've been digging them up like mad. I've used a few different web sites to find out more info. The 2nd photo looks more native as it has flowers on one side and the stem curves over. The others are very upright (typically foreign). None of the flowers seems to have much scent but it was only today that I made an effort to smell them (scent is typically native). The sites did say many many bluebells are hybrids. My pollen appears to be white (native) but I don't know if that's the pollen or the anthers I see in my photos. I've seen white, pink and blue/purple bluebells in the garden. Colour variation seems to be more foriegn. My bluebells have some native and some foregin characteristics so all-in-all I think they are probably hybrids.
bluebells 2 doors down mid-April 2016
bluebells back garden next door mid-April 2016
and the next garden along
Victor jumped over there as soon as I started looking at the bluebells