Horse Fly from the UK

Subject:  what is this
Geographic location of the bug:  Lancaster UK
Date: 07/01/2021
Time: 01:15 PM EDT
Your letter to the bugman:  hello
I live in Lancaster UK and found this big bug outside my window
what is it?
I know it’s not a great picture
it’s got massive eyes which it keeps cleaning and its about 1 or 2 inch long
I’m curious
How you want your letter signed :  thanks for your help, stef

Horse Fly

Dear Stef,
This is a Horse Fly and it appears by the spacing of the eyes that this is a female.  Female Horse Flies are blood-suckers and they will deliver a painful bite.  We believe your individual may be a Dark Giant Horse Fly.

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