Nut Weevils (Curculio sp.?) were queuing up to drill in this acorn, presumably to oviposit:
A hoverfly (possibly Didea fasciata) was ovipositing near aphids, presumably food for its young, running the gauntlet of the ants defending them. (Sorry it's not a great picture - the wind was moving things around alot).
An impressive-looking member of the Parasitica here resting briefly for a clean:
Neurotenus quercusbaccarum (Common spangle gall):