I've been keeping an eye on some of the domestic schedules since I will want to head to GLA once restrictions relax. Currently, the BA LHR-GLA schedule even into June is quite sparse. Three flights a day in the first half of May increasing to four a day from then through to June. With many of these being operated by A319. The prices on some dates are already high. Will BA put on extra services as demand materialises (or larger aircraft), or will they just stick to the limited schedule and milk it for what they can get?