Sempervivum

"Live for ever" is the meaning of the Latin name of house leeks, and they do last a long time. I have lots of them in pots, but these are the smallest. 
No gardening today, there was a cold wind so I stayed indoors and updated the WI website. A member had sent me forty photos of the WI Garden Group visit to Polesden Lacey, and by the time I had downloaded each one, changed its format and made my selection before composing the web page, three hours had passed. The resulting page looks good because she is an excellent photographer, but I wish it didn't take me so long!