I think you might find that Sunwing played hardball at the last lease signing with ECA and insisted that ECA utilise some of the SW crew in the summer.
European contract crew are absorbed into the ECA numbers and can operate with any of the Cypriot crew , surely a better and more flexible bet if hands are not tied by lease agreements ?
I was one of the ECA contract crew unceremoniously dumped with 30 days notice ( as per our contract I hasten to add ) when the Canadian deal was kicking in . Peeved at the time , but very glad that it happened as I am now working for a much more enjoyable operator.