Can you use pen to vote in UK local elections? Do I need to take a pencil?

Can you use pen to vote in UK local elections? Or do you need to take a pencil? Here are the rules for this year's elections explained.

Can you use pen to vote in UK local elections? Do I need to take a pencil?
Can you use pen to vote in UK local elections? Or do you need to take a pencil? Here are the rules for this year's elections explained.