We had a slight frost on Saturday night - 11-12 June; my record late frost here was on the 16th a few years ago. The tips of the potatos were shrivelled, and one or two beans which escaped the fleece were blasted. The oca was OK, as was everything in the mini-greenhouses. Not too much damage, but it's unexpected this late.
I've been planting out peas and brassicas; the Daubenton's Kale is now almost a foot high, and out among the peas. When I pull them, the brassicas can grow on and profit from the extra nitrogen.