Visibility - Poor.

       Speed  - LOW.  It was not a brilliant run home - BUT - could have been much worse.  A session or two of Stationary wait; with the usual "WHY?" when we got free to return to cruising speed.
       THEN came the Mog/Fist "stuff" started. Not sure if it was technically a "Fog" or a "Mist" but it did have a sensible slowing effect.
       Eventually we let it and - behold what we saw - Extra.