I think with COVID hammering aviation, when the 80/20 rule returns there will be slot churn at LHR. It's clear China Airlines, Westjet and jetBlue don't actually want to be at LGW and so I'd suspect they'd snap up any of the available slots. jetBlue taking really sub-optimal LHR slots to just get started shows that much. LGW's future expansion is likely to be Wizz Air focussed more than anything.