" Joyousness "

... Along the footpath about a kilometre away we found such a delicately pretty shrub in full bloom - we have no idea of it's name or anything about it, but thought I'd best take a snap very soon before the prettiness has gone, until we see it in a year's time...the shrub doesn't appear to flower for very long. I thought it would make another different subject for you to see.
Has anyone any ideas of what it is called? It appears to be an old shrub ...