We recorded 1mm of rain in the whole of May. It started, unannounced. My sister, whose house is about 200 yards from mine, rushed out to get her washing in, getting soaked in the process. By the time she was back inside the rain had stopped.
24 hours ago the forecast for Wednesday/Thursday was for a good old-fashioned overnight downpour. That has now been downgraded to up to 12 hours of light rain, but they seem to lack confidence that it will actually happen.