Unknown plant - garden escape?

Unknown plant - garden escape?

Observation - Unknown plant - garden escape?. Description: The local hedgerows are based on drystone walls. This is at a height of about 200m above sea level, and 1km from the sea. There's quite a bit of this plant about, along with huge nubers of foxgloves.

The local hedgerows are based on drystone walls. This is at a height of about 200m above sea level, and 1km from the sea. There's quite a bit of this plant about, along with huge nubers of foxgloves.