Most of us get annoyed by bad grammar, but one man has taken the law into his own hands.

A grammar vigilante has been going out in disguise at night for the past 13 years, putting a full stop to bad punctuation on signs!

Using an 'apostrophiser pole' to reach the mistakes; he adds or takes away apostrophes, commas and full stops.

The first poster to inspire him was a sign for Amy's Nail's in Bristol; he removed the second apostrophe.