Stik
Take everything you can with you - one short dunk in freeeeezing water can really shorten your odds (!) and anyway, I note you have a spare set of wings so you are on the right track already ! Have you ever practised ditching drills ? Even in a swimming pool, it's effing freezing !!
The drill is to open all plastic wrapped gear as soon as possible because your fingers are basically useless after only minutes in the Irish Sea.
Oh and by the way, as soon as you are over water you will hear very unusual engine note changes, experience vibration at various frequencies and generally feel the hackles rising at the back of your neck for no apparent reason at all. This of course, is usually self induced