It is a British native wild plant, but it is also grown intentionally in gardens.
In the wild, it occurs with purple flowers typically, but with white flowers now and then (as with bluebells, foxgloves, etc.). In gardens you may find other forms such as a white one with variegated leaves (which I used to grow).
If you're lucky, you'll see a male orange-tip butterfly nectaring on it. The contrast of the orange and purple can be rather photogenic, in a somewhat garish sort of way.