Small Spurwing (?)

I photographed this small mayfly last week early in the morning. I'm not certain on the ID, small spurwing would be a guess looking at other pictures.

 

It was about 18mm long including the tail, found in a water meadow with water channels. It has two tails.

 

42 images stacked in zerene stacker, dmap. Sigma 150mm, 1/80, f.4.0, ISO 200.

 

Best viewed large!

Done