I've been in one of those woodlands for the past two evenings and photographed. The closes one to us here in Sheffield is the Ecclesall woods. It's a 400 year old forest, which is required for these flowers.
Ecclesall Woods is best one to visit in Sheffield if you want to see bluebells, but unfortunately it is not as good as some other forests around the country.
The flowers do not cover the forest entierly, but in some areas it can be an awful lot of them :)
I found it was rather difficult photographed because of all the small trees and shrubs that always were in the way.
This weekend Sat-Mon (bank holiday here in UK), I will again go to the Lake District NP. This time we are hiking with a bunch of friends and climb the highest peak in England - Scafell Pike with its 978meter above sea level. It may not sound impressive but it is very steep and difficult to climb.