As you say Colin, tides are cancelling, although we are heading towards a full moon on Sunday so working out tide stream speeds is not so much fun.
Are you planning a daylight crossing? I've done both and I must admit I preferred the night one as you can see the lights from further out than marks in the daylight.
The original plan was to sail to Guernsey on Friday, but in order to make safe passage through the Alderney Race it would have meant departing Lymington at around midnight Thursday and unfortunately a couple of the crew couldn't make it, hence Alderney then possibly Omonville la rogue or Cherbourg.
The wind sites have been predicting high winds, up to F6/7 on Sunday but today its all change again.
If we do Alderney Friday we'll have NW to WNW, which will be fine until its wind against tide.
Saturday hopefully blown over to the mainland, but Sunday if the sites are correct we should get southerly winds to blow us back to blighty.
Wish you could have come along, it'll be a fun run with some excitement.