Meteo france shows 'sparse' rain in the afternoon and then again in the evening. The Met. Office synoptic charts show a series of three fronts (CCW) from ca. 13.00 and given there is a big (6 deg) drop in temp between T/W, something is happening.
But it's all about timing with these kind of summer storm / weak fronts…the difference between a cloudy day or spot of drizzle rather than a big squall line is so locally very variable; system more sluggish than predicted and you have a nice day, perhaps no rain until the evening. If front occludes a bit, you have a spot of drizzles rather than a squall...
From what I've seen, if you asked me to bet a fiver, I'd think rain is quite likely in the afternoon; may not be that heavy.