How common an occurrence is it to miss an approach, then come back and make an attempt in the opposite direction?
Due to the nature of fog, you might find that as the fog sets in at one end of an airfield, the other side can be slightly better and after a go-around, after a discussion with your colleague on the flight deck and ATC, the information presented may well suggest an attempt on the opposite end would be your best chance of landing successfully before diverting elsewhere.