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Looks like it, I have found examples of mauve and white flowered 'bluebells' in woods locally (N.E.essex). However, having said that we do have flowers very similar to bluebells in the garden, please dont ask their names, but I know they are not true bluebells.
I found the comments by Chris on the following link were very clear and useful.
Lat/Lng: 54.71587, -1.68243
OS grid ref: NZ205356