There needs to be a way to verify the mail ballot upon reciept and take a person off the voting roll so they can’t vote again.
In constituencies like Oldham or Bradford the voting roll will have 30-40 Mohammed Ashraf Khans, 20 or so Mukhter Hyder Alis, and a handful of Mansour Begums.
In my area (Louth & Horncastle) we have had no mither at all, mind you we are a rural area.