What is this Plant?

What is this Plant?

Observation - What is this Plant? - UK and Ireland. Description: I am not sure I have every seen this before, it was growing all along the edge of a cultivated field on the South Downs. Its strikingly pretty flowers were about 20 mm across. Is it a native wildflower or another escapee?

I am not sure I have every seen this before, it was growing all along the edge of a cultivated field on the South Downs. Its strikingly pretty flowers were about 20 mm across. Is it a native wildflower or another escapee?