As an entrant in 2014, I've just had the advance warning email for registration, which will open for non 2014-ers on 18th December 2014.
https://scillyswimchallenge2015.eventbrite.co.uk
Be aware that us 2014-ers get a 2 week advance window, so some of the places will undoubtedly have already gone by Dec 18th. its clear from the o/water swimming facebook groups that this will be an event of huge interest so if you wanna get in and you are not a 2014-er 9think i was the only one?) then you will probably need to get in as soon as doors open so to speak (CF Dart 10K and Brownsea)
questions to info@scillyswimchallenge.co.uk
It is HIGHLY recommended
Didds (who will NOT be returning!)