Am I a longhorn beetle?

       Am I a longhorn beetle?

Observation - Am I a longhorn beetle? - UK and Ireland. Description: I was looking at a photo I had taken in the sun last Sunday of a small pearl bordered fritillary in the wet grassy bank area of Fen Bog, and noticed this little insect making an unexpected appearance. At first I thought it was a longhorn beetle but am not

I was looking at a photo I had taken in the sun last Sunday of a small pearl bordered fritillary in the wet grassy bank area of Fen Bog, and noticed this little insect making an unexpected appearance. At first I thought it was a longhorn beetle but am not so sure now. Any ideas?