yes it's possible, no need to have the 14 ATPL + commercial+ MCC. only a privat license is needed as long you pay the airline to work.
it' s called the P2F!
This is the answer from the CAA in Gatwick.
even our government agrees about these P2F scheme and the massacre of this profession!!!
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Although this Department is responsible for civil aviation policy matters, we do not have responsibility for any financial arrangements made between a pilot and an airline in order to gain experience in flying commercial aircraft. However, I am able to confirm that the Civil Aviation Authority is satisfied that self sponsorship by newly qualified pilots does not have any detrimental effect on safety.