About 4 - 5 mm yesterday, some of which started within a minute of me leaving home for the mostly off-road 8½ mile walk to the Malt Shovel.
Due to the cool breeze I decided to wear my new Pramo Bentu fleece, as it's supposed to be wind-resistant and showerproof in spite of being very light. It certainly stopped most of the brisk, 14 deg. C, wind and, so far as I could tell, didn't leak. The rain was enough to wet one side of my shorts and almost soak the Tilley hat, so I'm pleased with the fleece.
After my attempts to restore osmotic balance across my skin with 3 pints of diluted water I had a happy trip home and the bus driver pulled up outside my house to save me 50 yards in quite heavy rain.
Rain stopped then. Hung hat out in sunshine - 2 hours later there was a sudden, short, heavy shower, so hat was spun.