Peers backed a short-term scheme for summer and winter 2026 allowing airlines to hand back up to 10% of airport slots without losing them next year, but several argued the cap may be too rigid and could shift cancellation and disruption costs onto passengers and airports. Ministers said the measure is temporary, responds to Middle East disruption and will be followed by longer-term slot rules in the civil aviation Bill, while promising further detail on how the 5% and 10% figures were chosen.