Mystery Flower

A lovely hot and sunny day for working in the garden and finding all sorts of mystery plants:-)  Can anyone help me with the name of this one please?  I feel I ought to know it, but just can't remember!

The hanging baskets have had to come down because the strong winds recently took their toll on them and they were looking very bedraggled.  Now trying to decide what to put in some planters to brighten up the front of the house for the autumn/winter.  Any suggestions?