Well looking at the latest forcasts looks like even us 6 mtr people may get across the Channel .... though for my part, not as far South as St Malo. It will take me to long - Not enough daylight at this time of year and the weather a bit too fickle.
However may well do Alderney or Cherbourg (or Boulogne) on Sat/Sun or Mon/Tue. It depends how the Low behaves and provided it doesn't do a last minute change! Friday night decision by the look of it!
Watching the weather with interest.