I agree with vokes55 regarding the recovery of the short haul leisure and VFR market. Gatwick suffered a great deal when the pandemic affected this sector but the upside is that it will recover quite quickly as this market is now improving rapidly.
British Airways have also hugely expanded their Heathrow short haul leisure this year capture some of that market. It’s been a while since BA operated 4 or 5 flights daily to Malaga, Palma, Faro etc… from Heathrow,
I also hear bookings at BA Euroflyer are doing well.
I also have been told that the BA Mainline long haul from Gatwick is doing well in all cabins to leisure destinations.