From my experience, they want TLV PoS availability, which is always frustrating as we can't see it. On Expertflyer, we can see the UK and the US. I have never been able to match up the TLV info to either of them, so always some guesswork sadly.

In the past I have found agents willing to switch PoS, but that has stopped completely in the past couple of years.

BTW - if anyone knows which availability figures (UK or US) generally most closely match the TLV figures, would love to know.