First up was a Brown-Banded Carder Bee (Bombus Humilis). Quite difficult to photograph in the breeze but I think you can make out on both photos the single brown band that runs across near the top of the abdomen. Otherwise a generally pale buff bee.
Then a number of Shrill Carder Bees (Bombus Sylvarum). These were quite small and showed a distinctive colour sequence: black band on the thorax between two white stripes, then a clear black band on the abdomen above a small but distinctive orange tail. Compare the photo below with this, clearly the same bee! Thrilled to encounter these two splendid bees.
finally a plump dark Adder slithered quickly off the path, no doubt disturbed by my heavy footfall.
So, a fantastic selection of wildlife in a small yet spectacular reserve.