Group goes only with sponsorship: Join this list only if you're willing to stump up £65 now and lose that £65 (it will become a donation to an Icelandic children's charity, in effect) if no sponsor for van and accommodation can be found.
Earthloop
Jadias
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Group goes no matter what: Join this list only if you're willing to stump up £65 now and pay your share of the full costs if no sponsor can be found.
Group goes only with sponsorship: Join this list only if you're willing to stump up £65 now and lose that £65 (it will become a donation to an Icelandic children's charity, in effect) if no sponsor for van and accommodation can be found.
Group goes no matter what: Join this list only if you're willing to stump up £65 now and pay your share of the full costs if no sponsor can be found.