Dragonfly - but which one?

Dragonfly - but which one?

Observation - Dragonfly - but which one? - UK and Ireland. Description: I saw this dragonfly last week. It was perched up in tree so I couldn't get a better view of it. I have been unable to decide which species it is?

I saw this dragonfly last week. It was perched up in tree so I couldn't get a better view of it. I have been unable to decide which species it is?