Q515: A political canvasser has just come to my door and offered to fill in my postal vote and post it, is that allowed?
No, it is not allowed. The right to vote for a particular political party is one that you must freely make yourself. It is important that you fill the form in and post it yourself.
It is an offence to impersonate another person at an election and if you know anyone who is doing this you should report the person to your local police via their 101 number.