Fly on achillea

Another wet morning but it brightened up nicely this afternoon. A visit to the supermarket to stock up and a quick stop at my parents on the way home to sign some papers. I've been watching the white butterflies through the window this afternoon and there seems to have been quite a few of them, but whenever I've ventured outside to photograph them they just disappear. I even saw my first painted lady on the buddleia, but in the end it was either a greenfly on the marguerites or this fly on some achillea.