Flower Scotney Castle May 2014

Flower Scotney Castle May 2014

Observation - Flower Scotney Castle May 2014 - UK and Ireland. Description: A friend of mine photographed this plant growing on a wall at Scotney Castle in Kent yesterday (17th May 2014). He said it was growing in a similar way to a stonecrop. I don't recognise it myself and wonder if it is an exotic/garden plant. Any ideas

A friend of mine photographed this plant growing on a wall at Scotney Castle in Kent yesterday (17th May 2014). He said it was growing in a similar way to a stonecrop. I don't recognise it myself and wonder if it is an exotic/garden plant.
Any ideas