Flower with no name

Saturday
Raining on and off all day again. Dennis went out to get some felt for the shed roof while I stayed home and made some soup for lunch.
Steven, Lisa, and Norah came over at lunchtime, followed shorly after by Calum and Rachel, who were on their way back from a wedding in Perth. We looked after Norah while Steven went off to work and Lisa to the Gyle.
I have two pots in the garden with these lovely purple plants, but as usual, the labels have vanished, and I can't remember what they are called.