Use of Autoland in Adverse Weather

[Locked door]

Go around. If you attempt to fly below your briefed da you're asking for trouble. If at planned da you lose the required visual references, or if in your judgement you can't see well enough to continue safely you must go around. In the time it takes to go from 200 ft agl (cat 1) to 100 ft agl (cat 2) you don't have time to consider variables such as

1) are LVP's in force
2) aircraft auto land serviceability
3) airfield auto land capability
4) auto land crosswind limits
5) decide on and re bug a new minima

There are other things to consider, that list is just a snapshot. Far safer to go around, re brief, and try again. No one has ever collided with the sky.