Actually I'd forgotten but I did waste some time on the first night in France looking for water. I had plenty of food but was getting thirsty around 2am. I went looking round the back of churches, and searched a few petrol stations, for taps - all to no avail. I did see other tyre tracks in the grass round a couple of churches, so wasn't the only one looking there.
I probably lost half an hour looking for water, before I lucked out and found a boulangerie on my route which was open at 4:50am.