Trevs
Not heard of any denials, Police would be hard pressed to deny the E endorsement if you already have a Firearms Licence as you have already been deemed a "Fit & Proper Person" only thing that could hold you back is substandard security or recent Head injuries/Mental Health issues/Violence issues etc.
List everything you can think of for your reasons and add "And Any Other Lawful Purpose" that way your covered for anything you forgot to add.
Good Luck
Cheers
Pete
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