Mayfly?

Mayfly?

Observation - Mayfly?. Description: I found this large insect flying around my kitchen, which was somewhat disturbing as it was quite big (maybe 9cm long). However I was able to carefully trap it under a glass and take photos before releasing it. I think it may be a mayfly, but would apprec

I found this large insect flying around my kitchen, which was somewhat disturbing as it was quite big (maybe 9cm long). However I was able to carefully trap it under a glass and take photos before releasing it. I think it may be a mayfly, but would appreciate help with identifying it.
* having measured the glass I caught it in (a normal pint glass) I think it may have been more like 5-7cm long (2-3 inches)