Despite the poor weather forecast, it was a nice, sunny spring day - at least, it was out on the coast though I gather inland there were torrential downpours and hailstorms.
With the sun came the insects, notably the gorse shieldbug Piezodorus lituratus. Dozens of them were crawling up to the ends of the gorse Ulex europaeus stems. The eggs are laid on the gorse flowers.
At this time of year they are mostly green, having overwintered as adults. The new generation in late summer will have purple-red markings.
They can be found almost anywhere across Europe to southern Scandinavia - anywhere there is gorse, but they also make use of several other related plants such as broom, dyer's greenweed, laburnum and sometimes clovers.
More photos of adults, nymphs and eggs here