Part of the reason why the Irish market is stronger than the Scottish one is the very large Irish populations around the eastern seaboard plus the additional ADP levy in Scotland.
I think it might work better by shifting the Scottish routes to JFK or BOS but that would significantly increase the cost.
No evidence of D8 getting smaller at LGW 11 aircraft 3 to be used for Tui charter and some rumoured long thin routes to come
I guess the revenue from APD helps prop up PIK