I never said the won’t leave LGW, I replied to your typically anti-LGW remark that they “don’t actually want to be there”. They’ve had plenty of opportunities to move to LHR over the past 16 months but haven’t bothered. And if they “don’t actually want to be there”, they’d move their most important/competitive routes to LHR and run a split operation until they can obtain all the slots they want. They wouldn’t be the first airline to run a split operation between LHR/LGW. They haven’t done either.
Anyone can apply for slots at LHR, it doesn’t cost them anything. Norwegian even obtained slots at LHR.