Dragonfly...sp?

Dragonfly...sp?

Observation - Dragonfly...sp?. Description: Blurry image but can anyone ID from this? There wre two of these, large, speedy Dragonflies flying back and forth over the bracken around this track; they did not alight. Nearest river almost a mile away, though a few springs around

Blurry image but can anyone ID from this? There wre two of these, large, speedy Dragonflies flying back and forth over the bracken around this track; they did not alight. Nearest river almost a mile away, though a few springs around