If they want to sell the slots they need to get a move on. The Consumer and Marketing Authority is proposing an auction based, as against administratively allocated, airport slot system a la TOC's and Mobile Phone Channels:-
>d. Increased financial risks to airlines – in a sector that already has low operating profit margins, and given the cyclical nature of the airline industry, increasing costs may push the least efficient airlines out of business. While this may lead to a more efficient and effective market in the medium to long term, there may be unintended consequences from an aviation policy perspective. For example, if an airline went into administration, passengers are likely to face significant disruption. However, this risk could be mitigated by allowing airlines time to plan for a slot auction and being explicit about forward auction timetabling.<
https://assets.publishing.service.go...port-slots.pdf