There was a comment on this thread a few days ago stating the precise figures before and after tax for a UK based Captain on permanent contract. Its been deleted now, anyhow thanks for the info!!
Folks, thanks for the info on Spanish Social security etc, I think we have made the issue as clear as possible on a public forum.
I'd personally much rather work on a permanent employee contract. However, if you are making the choice to settle in a country for the longterm its good to know that your stamp is fully paid up for the future!