Warm with some sun.
This is one of the Miridae - Capsid Bugs. I didn't identify it last year and I just spent 2 hours finding out lots of Capsids that it isn't. About 10mm long; 1 insect per leaf, all watching each other.
Calocoris stysi.
This is the hybrid between Hedge Woundwort (dark purple) and Marsh Woundwort (narrow leaves) - Stachys x. ambigua. Both parents were nearby.
The 2nd brood of Small Tortoiseshells is very numerous this year. I see them every day, now.
Upright Hedge Parsley - Torilis japonica - is the last and most delicate of the Umbellifers to emerge. The flower head is only about 4 cm. across.
I always think the purple stalks and buds of this Woody Nightshade - Solanum dulcamara - look dark and menacing. This plant is closely related to the Tomato, as the flower shape will indicate. Poisonous.