Wall Lettuce (Mycelis muralis)

Wall Lettuce (Mycelis muralis)

Observation - Wall Lettuce (Mycelis muralis) - UK and Ireland. Description: Leaves appear to grow as a rosette. Individual leaves are divided into separate leaflets. The leaflets have pointed lobes. Young leaves are purple, becoming green as they age. Can anyone help with an ID, please? Edit: title changed to match lavateraguy's

Leaves appear to grow as a rosette. Individual leaves are divided into separate leaflets. The leaflets have pointed lobes. Young leaves are purple, becoming green as they age. Can anyone help with an ID, please?
Edit: title changed to match lavateraguy's ID. Many thanks.