it depends on the airlines capability to conduct type rating, what their sim schedule is, with opc/lpc going on. like aer lingus at the moment they have an A320 sim but it is busy 24 hours a day so they have sent a lot of guys to toulousse (particularly the low hour guys ) as they cant wait on their own sim to become available. with aer lingus this scenario could go on for the next year or so. but they only have 1 sim, BA / AIR FRANCE HAVE MANY MORE BUT THEY CAN GET CAUGHT SHORT TOO. RYANAIR NEARLY KEEP cae AND sas GOING ALL THE TIME.hope this answers your question.