Watched the incident several times. Mason does blow to allow a quick free kick as should be allowed but, in milliseconds, he notices the keeper is no where near ready and correctly blows for the kick to be re taken again. The man is human, he made an initial mistake but corrected this before it was too late.

Believe me when I say, you have to have the eyes of bee, a neck the turning circle of an Owl and the patience of a saint to Ref a match. I did it for 15 years so speak from experience. Credit to Lee Mason for realising his oversight, great officiating!