This evening I saw less than ten Brown Argus at Penhale. Most were tatty and at the end of their life. The second brood in July will be the next opporunity. That said, with very strong low sunshine, I managed to get some quite nice back lit images as they perched on the tops, straining to get the last remnants of heat.
Brown Argus backlit with low sunshine. Nikon D3x, 105mm VR Macro Lens.